diff --git a/minidump/minidump.gyp b/minidump/minidump.gyp
index 2fabeaad..8ea64eff 100644
--- a/minidump/minidump.gyp
+++ b/minidump/minidump.gyp
@@ -32,6 +32,8 @@
         'minidump_context.h',
         'minidump_context_writer.cc',
         'minidump_context_writer.h',
+        'minidump_crashpad_info_writer.cc',
+        'minidump_crashpad_info_writer.h',
         'minidump_exception_writer.cc',
         'minidump_exception_writer.h',
         'minidump_extensions.cc',
@@ -76,6 +78,7 @@
         'minidump_context_test_util.cc',
         'minidump_context_test_util.h',
         'minidump_context_writer_test.cc',
+        'minidump_crashpad_info_writer_test.cc',
         'minidump_exception_writer_test.cc',
         'minidump_file_writer_test.cc',
         'minidump_file_writer_test_util.cc',
@@ -87,6 +90,8 @@
         'minidump_module_writer_test.cc',
         'minidump_simple_string_dictionary_writer_test.cc',
         'minidump_string_writer_test.cc',
+        'minidump_string_writer_test_util.cc',
+        'minidump_string_writer_test_util.h',
         'minidump_system_info_writer_test.cc',
         'minidump_thread_writer_test.cc',
         'minidump_writable_test.cc',
diff --git a/minidump/minidump_crashpad_info_writer.cc b/minidump/minidump_crashpad_info_writer.cc
new file mode 100644
index 00000000..2ad7291f
--- /dev/null
+++ b/minidump/minidump_crashpad_info_writer.cc
@@ -0,0 +1,80 @@
+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "minidump/minidump_crashpad_info_writer.h"
+
+#include "base/logging.h"
+
+namespace crashpad {
+
+MinidumpCrashpadInfoWriter::MinidumpCrashpadInfoWriter()
+    : MinidumpStreamWriter(), crashpad_info_(), simple_annotations_() {
+  crashpad_info_.size = sizeof(crashpad_info_);
+  crashpad_info_.version = 1;
+}
+
+MinidumpCrashpadInfoWriter::~MinidumpCrashpadInfoWriter() {
+}
+
+void MinidumpCrashpadInfoWriter::SetSimpleAnnotations(
+    MinidumpSimpleStringDictionaryWriter* simple_annotations) {
+  DCHECK_EQ(state(), kStateMutable);
+
+  simple_annotations_ = simple_annotations;
+}
+
+bool MinidumpCrashpadInfoWriter::Freeze() {
+  DCHECK_EQ(state(), kStateMutable);
+
+  if (!MinidumpStreamWriter::Freeze()) {
+    return false;
+  }
+
+  if (simple_annotations_) {
+    simple_annotations_->RegisterLocationDescriptor(
+        &crashpad_info_.simple_annotations);
+  }
+
+  return true;
+}
+
+size_t MinidumpCrashpadInfoWriter::SizeOfObject() {
+  DCHECK_GE(state(), kStateFrozen);
+
+  return sizeof(crashpad_info_);
+}
+
+std::vector<internal::MinidumpWritable*>
+MinidumpCrashpadInfoWriter::Children() {
+  DCHECK_GE(state(), kStateFrozen);
+
+  std::vector<MinidumpWritable*> children;
+  if (simple_annotations_) {
+    children.push_back(simple_annotations_);
+  }
+
+  return children;
+}
+
+bool MinidumpCrashpadInfoWriter::WriteObject(FileWriterInterface* file_writer) {
+  DCHECK_EQ(state(), kStateWritable);
+
+  return file_writer->Write(&crashpad_info_, sizeof(crashpad_info_));
+}
+
+MinidumpStreamType MinidumpCrashpadInfoWriter::StreamType() const {
+  return kMinidumpStreamTypeCrashpadInfo;
+}
+
+}  // namespace crashpad
diff --git a/minidump/minidump_crashpad_info_writer.h b/minidump/minidump_crashpad_info_writer.h
new file mode 100644
index 00000000..f36c91f5
--- /dev/null
+++ b/minidump/minidump_crashpad_info_writer.h
@@ -0,0 +1,69 @@
+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef CRASHPAD_MINIDUMP_MINIDUMP_CRASHPAD_INFO_WRITER_H_
+#define CRASHPAD_MINIDUMP_MINIDUMP_CRASHPAD_INFO_WRITER_H_
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "minidump/minidump_extensions.h"
+#include "minidump/minidump_simple_string_dictionary_writer.h"
+#include "minidump/minidump_stream_writer.h"
+#include "minidump/minidump_writable.h"
+#include "util/file/file_writer.h"
+
+namespace crashpad {
+
+//! \brief The writer for a MinidumpCrashpadInfo stream in a minidump file.
+class MinidumpCrashpadInfoWriter final : public internal::MinidumpStreamWriter {
+ public:
+  MinidumpCrashpadInfoWriter();
+  ~MinidumpCrashpadInfoWriter();
+
+  //! \brief Arranges for MinidumpCrashpadInfo::simple_annotations to point to
+  //!     the MinidumpSimpleStringDictionaryWriter object to be written by \a
+  //!     simple_annotations.
+  //!
+  //! \a simple_annotations will become a child of this object in the overall
+  //! tree of internal::MinidumpWritable objects.
+  //!
+  //! \note Valid in #kStateMutable.
+  void SetSimpleAnnotations(
+      MinidumpSimpleStringDictionaryWriter* simple_annotations);
+
+ protected:
+  // MinidumpWritable:
+  bool Freeze() override;
+  size_t SizeOfObject() override;
+  std::vector<MinidumpWritable*> Children() override;
+  bool WriteObject(FileWriterInterface* file_writer) override;
+
+  // MinidumpStreamWriter:
+  MinidumpStreamType StreamType() const override;
+
+ private:
+  MinidumpCrashpadInfo crashpad_info_;
+  MinidumpSimpleStringDictionaryWriter* simple_annotations_;  // weak
+
+  DISALLOW_COPY_AND_ASSIGN(MinidumpCrashpadInfoWriter);
+};
+
+}  // namespace crashpad
+
+#endif  // CRASHPAD_MINIDUMP_MINIDUMP_CRASHPAD_INFO_WRITER_H_
diff --git a/minidump/minidump_crashpad_info_writer_test.cc b/minidump/minidump_crashpad_info_writer_test.cc
new file mode 100644
index 00000000..f0b4e24d
--- /dev/null
+++ b/minidump/minidump_crashpad_info_writer_test.cc
@@ -0,0 +1,155 @@
+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "minidump/minidump_crashpad_info_writer.h"
+
+#include <dbghelp.h>
+
+#include "gtest/gtest.h"
+#include "minidump/minidump_extensions.h"
+#include "minidump/minidump_file_writer.h"
+#include "minidump/minidump_file_writer_test_util.h"
+#include "minidump/minidump_simple_string_dictionary_writer.h"
+#include "minidump/minidump_string_writer_test_util.h"
+#include "util/file/string_file_writer.h"
+
+namespace crashpad {
+namespace test {
+namespace {
+
+void GetCrashpadInfoStream(
+    const std::string& file_contents,
+    const MinidumpCrashpadInfo** crashpad_info,
+    const MinidumpSimpleStringDictionary** simple_annotations) {
+  const size_t kDirectoryOffset = sizeof(MINIDUMP_HEADER);
+  const size_t kCrashpadInfoStreamOffset =
+      kDirectoryOffset + sizeof(MINIDUMP_DIRECTORY);
+  size_t end = kCrashpadInfoStreamOffset + sizeof(MinidumpCrashpadInfo);
+  const size_t kSimpleAnnotationsOffset = simple_annotations ? end : 0;
+  if (simple_annotations) {
+    end += sizeof(MinidumpSimpleStringDictionary);
+  }
+  const size_t kFileSize = end;
+
+  if (!simple_annotations) {
+    ASSERT_EQ(kFileSize, file_contents.size());
+  } else {
+    EXPECT_GE(file_contents.size(), kFileSize);
+  }
+
+  const MINIDUMP_HEADER* header =
+      reinterpret_cast<const MINIDUMP_HEADER*>(&file_contents[0]);
+
+  ASSERT_NO_FATAL_FAILURE(VerifyMinidumpHeader(header, 1, 0));
+
+  const MINIDUMP_DIRECTORY* directory =
+      reinterpret_cast<const MINIDUMP_DIRECTORY*>(
+          &file_contents[kDirectoryOffset]);
+
+  ASSERT_EQ(kMinidumpStreamTypeCrashpadInfo, directory->StreamType);
+  ASSERT_EQ(sizeof(MinidumpCrashpadInfo), directory->Location.DataSize);
+  ASSERT_EQ(kCrashpadInfoStreamOffset, directory->Location.Rva);
+
+  *crashpad_info = reinterpret_cast<const MinidumpCrashpadInfo*>(
+      &file_contents[kCrashpadInfoStreamOffset]);
+
+  if (simple_annotations) {
+    ASSERT_GE((*crashpad_info)->simple_annotations.DataSize,
+              sizeof(MinidumpSimpleStringDictionary));
+    ASSERT_EQ(kSimpleAnnotationsOffset,
+              (*crashpad_info)->simple_annotations.Rva);
+    *simple_annotations =
+        reinterpret_cast<const MinidumpSimpleStringDictionary*>(
+            &file_contents[kSimpleAnnotationsOffset]);
+  } else {
+    ASSERT_EQ(0u, (*crashpad_info)->simple_annotations.DataSize);
+    ASSERT_EQ(0u, (*crashpad_info)->simple_annotations.Rva);
+  }
+}
+
+TEST(MinidumpCrashpadInfoWriter, Empty) {
+  MinidumpFileWriter minidump_file_writer;
+  MinidumpCrashpadInfoWriter crashpad_info_writer;
+
+  minidump_file_writer.AddStream(&crashpad_info_writer);
+
+  StringFileWriter file_writer;
+  ASSERT_TRUE(minidump_file_writer.WriteEverything(&file_writer));
+
+  const MinidumpCrashpadInfo* crashpad_info;
+
+  ASSERT_NO_FATAL_FAILURE(
+      GetCrashpadInfoStream(file_writer.string(), &crashpad_info, nullptr));
+
+  EXPECT_EQ(sizeof(*crashpad_info), crashpad_info->size);
+  EXPECT_EQ(1u, crashpad_info->version);
+  EXPECT_EQ(0u, crashpad_info->simple_annotations.DataSize);
+  EXPECT_EQ(0u, crashpad_info->simple_annotations.Rva);
+}
+
+TEST(MinidumpCrashpadInfoWriter, SimpleAnnotations) {
+  MinidumpFileWriter minidump_file_writer;
+  MinidumpCrashpadInfoWriter crashpad_info_writer;
+
+  minidump_file_writer.AddStream(&crashpad_info_writer);
+
+  MinidumpSimpleStringDictionaryWriter simple_annotations_writer;
+
+  // Set a key and value before adding the simple_annotations_writer to
+  // crashpad_info_writer, and another one after.
+  const char kKey0[] = "k0";
+  const char kValue0[] = "v";
+  const char kKey1[] = "KEY1";
+  const char kValue1[] = "";
+  MinidumpSimpleStringDictionaryEntryWriter entry_0;
+  entry_0.SetKeyValue(kKey0, kValue0);
+  simple_annotations_writer.AddEntry(&entry_0);
+
+  crashpad_info_writer.SetSimpleAnnotations(&simple_annotations_writer);
+
+  MinidumpSimpleStringDictionaryEntryWriter entry_1;
+  entry_1.SetKeyValue(kKey1, kValue1);
+  simple_annotations_writer.AddEntry(&entry_1);
+
+  StringFileWriter file_writer;
+  ASSERT_TRUE(minidump_file_writer.WriteEverything(&file_writer));
+
+  const MinidumpCrashpadInfo* crashpad_info;
+  const MinidumpSimpleStringDictionary* simple_annotations;
+
+  ASSERT_NO_FATAL_FAILURE(GetCrashpadInfoStream(
+      file_writer.string(), &crashpad_info, &simple_annotations));
+
+  EXPECT_EQ(sizeof(*crashpad_info), crashpad_info->size);
+  EXPECT_EQ(1u, crashpad_info->version);
+
+  ASSERT_EQ(2u, simple_annotations->count);
+
+  EXPECT_EQ(
+      kKey1,
+      MinidumpUTF8StringAtRVA(file_writer, simple_annotations->entries[0].key));
+  EXPECT_EQ(kValue1,
+            MinidumpUTF8StringAtRVA(file_writer,
+                                    simple_annotations->entries[0].value));
+  EXPECT_EQ(
+      kKey0,
+      MinidumpUTF8StringAtRVA(file_writer, simple_annotations->entries[1].key));
+  EXPECT_EQ(kValue0,
+            MinidumpUTF8StringAtRVA(file_writer,
+                                    simple_annotations->entries[1].value));
+}
+
+}  // namespace
+}  // namespace test
+}  // namespace crashpad
diff --git a/minidump/minidump_simple_string_dictionary_writer_test.cc b/minidump/minidump_simple_string_dictionary_writer_test.cc
index 16de38ea..a63cfb33 100644
--- a/minidump/minidump_simple_string_dictionary_writer_test.cc
+++ b/minidump/minidump_simple_string_dictionary_writer_test.cc
@@ -18,6 +18,7 @@
 
 #include "gtest/gtest.h"
 #include "minidump/minidump_extensions.h"
+#include "minidump/minidump_string_writer_test_util.h"
 #include "util/file/string_file_writer.h"
 
 namespace crashpad {
@@ -44,38 +45,6 @@ TEST(MinidumpSimpleStringDictionaryWriter, EmptySimpleStringDictionary) {
   EXPECT_EQ(0u, dictionary->count);
 }
 
-std::string MinidumpUTF8StringAtRVA(const StringFileWriter& file_writer,
-                                    RVA rva) {
-  const std::string& contents = file_writer.string();
-  if (rva == 0) {
-    return std::string();
-  }
-
-  if (rva + sizeof(MinidumpUTF8String) > contents.size()) {
-    ADD_FAILURE()
-        << "rva " << rva << " too large for contents " << contents.size();
-    return std::string();
-  }
-
-  const MinidumpUTF8String* minidump_string =
-      reinterpret_cast<const MinidumpUTF8String*>(&contents[rva]);
-
-  // Verify that the file has enough data for the string’s stated length plus
-  // its required NUL terminator.
-  if (rva + sizeof(MinidumpUTF8String) + minidump_string->Length + 1 >
-          contents.size()) {
-    ADD_FAILURE()
-        << "rva " << rva << ", length " << minidump_string->Length
-        << " too large for contents " << contents.size();
-    return std::string();
-  }
-
-  std::string minidump_string_data(
-      reinterpret_cast<const char*>(&minidump_string->Buffer[0]),
-      minidump_string->Length);
-  return minidump_string_data;
-}
-
 TEST(MinidumpSimpleStringDictionaryWriter, EmptyKeyValue) {
   StringFileWriter file_writer;
 
diff --git a/minidump/minidump_string_writer_test_util.cc b/minidump/minidump_string_writer_test_util.cc
new file mode 100644
index 00000000..7914c68a
--- /dev/null
+++ b/minidump/minidump_string_writer_test_util.cc
@@ -0,0 +1,56 @@
+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "minidump/minidump_string_writer_test_util.h"
+
+#include "gtest/gtest.h"
+#include "minidump/minidump_extensions.h"
+
+namespace crashpad {
+namespace test {
+
+std::string MinidumpUTF8StringAtRVA(const StringFileWriter& file_writer,
+                                    RVA rva) {
+  const std::string& contents = file_writer.string();
+  if (rva == 0) {
+    return std::string();
+  }
+
+  if (rva + sizeof(MinidumpUTF8String) > contents.size()) {
+    ADD_FAILURE()
+        << "rva " << rva << " too large for contents " << contents.size();
+    return std::string();
+  }
+
+  const MinidumpUTF8String* minidump_string =
+      reinterpret_cast<const MinidumpUTF8String*>(&contents[rva]);
+
+  // Verify that the file has enough data for the string’s stated length plus
+  // its required NUL terminator.
+  if (rva + sizeof(MinidumpUTF8String) + minidump_string->Length + 1 >
+          contents.size()) {
+    ADD_FAILURE()
+        << "rva " << rva << ", length " << minidump_string->Length
+        << " too large for contents " << contents.size();
+    return std::string();
+  }
+
+  std::string minidump_string_data(
+      reinterpret_cast<const char*>(&minidump_string->Buffer[0]),
+      minidump_string->Length);
+  return minidump_string_data;
+}
+
+}  // namespace test
+}  // namespace crashpad
diff --git a/minidump/minidump_string_writer_test_util.h b/minidump/minidump_string_writer_test_util.h
new file mode 100644
index 00000000..db0febcf
--- /dev/null
+++ b/minidump/minidump_string_writer_test_util.h
@@ -0,0 +1,42 @@
+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <dbghelp.h>
+
+#include <string>
+
+#include "util/file/string_file_writer.h"
+
+namespace crashpad {
+namespace test {
+
+//! \brief Returns the contents of a MinidumpUTF8String.
+//!
+//! If \a rva points outside of the range of \a file_writer, or if any of the
+//! string data would lie outside of the range of \a file_writer, this function
+//! will fail.
+//!
+//! \param[in] file_writer A StringFileWriter into which MinidumpWritable
+//!     objects have been written.
+//! \param[in] rva An offset in \a file_writer at which to find the desired
+//!     string.
+//!
+//! \return On success, the string read from \a file_writer at offset \a rva. On
+//!     failure, returns an empty string, with a nonfatal assertion logged to
+//!     gtest.
+std::string MinidumpUTF8StringAtRVA(const StringFileWriter& file_writer,
+                                    RVA rva);
+
+}  // namespace test
+}  // namespace crashpad