diff --git a/doc/index.ad b/doc/index.ad
index 5bb16f8f..3b06292e 100644
--- a/doc/index.ad
+++ b/doc/index.ad
@@ -34,8 +34,8 @@ https://chromium.googlesource.com/crashpad/crashpad.
 
 == Other Links
 
- * Bugs can be reported at the https://crashpad.chromium.org/bug/new[Crashpad
-   issue tracker].
+ * Bugs can be reported at the https://crashpad.chromium.org/bug/[Crashpad issue
+   tracker].
  * The https://build.chromium.org/p/client.crashpad[Crashpad Buildbot] performs
    automated builds and tests.
  * https://groups.google.com/a/chromium.org/group/crashpad-dev[crashpad-dev] is
diff --git a/handler/mac/exception_handler_server.cc b/handler/mac/exception_handler_server.cc
index 400df562..3757c454 100644
--- a/handler/mac/exception_handler_server.cc
+++ b/handler/mac/exception_handler_server.cc
@@ -27,13 +27,13 @@ namespace crashpad {
 namespace {
 
 class ExceptionHandlerServerRun : public UniversalMachExcServer::Interface,
-                                  public NotifyServer::Interface {
+                                  public NotifyServer::DefaultInterface {
  public:
   ExceptionHandlerServerRun(
       mach_port_t exception_port,
       UniversalMachExcServer::Interface* exception_interface)
       : UniversalMachExcServer::Interface(),
-        NotifyServer::Interface(),
+        NotifyServer::DefaultInterface(),
         mach_exc_server_(this),
         notify_server_(this),
         composite_mach_message_server_(),
@@ -144,22 +144,7 @@ class ExceptionHandlerServerRun : public UniversalMachExcServer::Interface,
                                                     destroy_complex_request);
   }
 
-  // NotifyServer::Interface:
-
-  kern_return_t DoMachNotifyPortDeleted(
-      notify_port_t notify,
-      mach_port_name_t name,
-      const mach_msg_trailer_t* trailer) override {
-    return UnimplementedNotifyRoutine(notify);
-  }
-
-  kern_return_t DoMachNotifyPortDestroyed(notify_port_t notify,
-                                          mach_port_t rights,
-                                          const mach_msg_trailer_t* trailer,
-                                          bool* destroy_request) override {
-    *destroy_request = true;
-    return UnimplementedNotifyRoutine(notify);
-  }
+  // NotifyServer::DefaultInterface:
 
   kern_return_t DoMachNotifyNoSenders(
       notify_port_t notify,
@@ -180,32 +165,7 @@ class ExceptionHandlerServerRun : public UniversalMachExcServer::Interface,
     return KERN_SUCCESS;
   }
 
-  kern_return_t DoMachNotifySendOnce(
-      notify_port_t notify,
-      const mach_msg_trailer_t* trailer) override {
-    return UnimplementedNotifyRoutine(notify);
-  }
-
-  kern_return_t DoMachNotifyDeadName(
-      notify_port_t notify,
-      mach_port_name_t name,
-      const mach_msg_trailer_t* trailer) override {
-    return UnimplementedNotifyRoutine(notify);
-  }
-
  private:
-  kern_return_t UnimplementedNotifyRoutine(notify_port_t notify) {
-    // Most of the routines in the notify subsystem are not expected to be
-    // called.
-    if (notify != notify_port_) {
-      LOG(WARNING) << "notify port mismatch";
-      return KERN_FAILURE;
-    }
-
-    NOTREACHED();
-    return MIG_BAD_ID;
-  }
-
   UniversalMachExcServer mach_exc_server_;
   NotifyServer notify_server_;
   CompositeMachMessageServer composite_mach_message_server_;
diff --git a/third_party/gmock/gmock.gyp b/third_party/gmock/gmock.gyp
index 22c22b14..d034ef72 100644
--- a/third_party/gmock/gmock.gyp
+++ b/third_party/gmock/gmock.gyp
@@ -198,20 +198,20 @@
           'target_name': 'gmock',
           'type': 'none',
           'dependencies': [
-            '../../../../../testing/gmock.gyp:gmock',
+            '<(DEPTH)/testing/gmock.gyp:gmock',
           ],
           'export_dependent_settings': [
-            '../../../../../testing/gmock.gyp:gmock',
+            '<(DEPTH)/testing/gmock.gyp:gmock',
           ],
         },
         {
           'target_name': 'gmock_main',
           'type': 'none',
           'dependencies': [
-            '../../../../../testing/gmock.gyp:gmock_main',
+            '<(DEPTH)/testing/gmock.gyp:gmock_main',
           ],
           'export_dependent_settings': [
-            '../../../../../testing/gmock.gyp:gmock_main',
+            '<(DEPTH)/testing/gmock.gyp:gmock_main',
           ],
         },
       ],
diff --git a/third_party/gtest/gtest.gyp b/third_party/gtest/gtest.gyp
index b9f23565..9bcb5f36 100644
--- a/third_party/gtest/gtest.gyp
+++ b/third_party/gtest/gtest.gyp
@@ -233,20 +233,20 @@
           'target_name': 'gtest',
           'type': 'none',
           'dependencies': [
-            '../../../../../testing/gtest.gyp:gtest',
+            '<(DEPTH)/testing/gtest.gyp:gtest',
           ],
           'export_dependent_settings': [
-            '../../../../../testing/gtest.gyp:gtest',
+            '<(DEPTH)/testing/gtest.gyp:gtest',
           ],
         },
         {
           'target_name': 'gtest_main',
           'type': 'none',
           'dependencies': [
-            '../../../../../testing/gtest.gyp:gtest_main',
+            '<(DEPTH)/testing/gtest.gyp:gtest_main',
           ],
           'export_dependent_settings': [
-            '../../../../../testing/gtest.gyp:gtest_main',
+            '<(DEPTH)/testing/gtest.gyp:gtest_main',
           ],
         },
       ],
diff --git a/third_party/mini_chromium/mini_chromium.gyp b/third_party/mini_chromium/mini_chromium.gyp
index 29f12635..56f897d3 100644
--- a/third_party/mini_chromium/mini_chromium.gyp
+++ b/third_party/mini_chromium/mini_chromium.gyp
@@ -34,10 +34,10 @@
           ],
         }, {  # else: crashpad_in_chromium!=0
           'dependencies': [
-            '../../../../../base/base.gyp:base',
+            '<(DEPTH)/base/base.gyp:base',
           ],
           'export_dependent_settings': [
-            '../../../../../base/base.gyp:base',
+            '<(DEPTH)/base/base.gyp:base',
           ],
         }],
       ],
diff --git a/util/mach/notify_server.cc b/util/mach/notify_server.cc
index 05495c65..48a4a9e9 100644
--- a/util/mach/notify_server.cc
+++ b/util/mach/notify_server.cc
@@ -105,6 +105,42 @@ kern_return_t MIGCheckRequestMachNotifyDeadName(
 
 namespace crashpad {
 
+kern_return_t NotifyServer::DefaultInterface::DoMachNotifyPortDeleted(
+    notify_port_t notify,
+    mach_port_name_t name,
+    const mach_msg_trailer_t* trailer) {
+  return MIG_BAD_ID;
+}
+
+kern_return_t NotifyServer::DefaultInterface::DoMachNotifyPortDestroyed(
+    notify_port_t notify,
+    mach_port_t rights,
+    const mach_msg_trailer_t* trailer,
+    bool* destroy_request) {
+  *destroy_request = true;
+  return MIG_BAD_ID;
+}
+
+kern_return_t NotifyServer::DefaultInterface::DoMachNotifyNoSenders(
+    notify_port_t notify,
+    mach_port_mscount_t mscount,
+    const mach_msg_trailer_t* trailer) {
+  return MIG_BAD_ID;
+}
+
+kern_return_t NotifyServer::DefaultInterface::DoMachNotifySendOnce(
+    notify_port_t notify,
+    const mach_msg_trailer_t* trailer) {
+  return MIG_BAD_ID;
+}
+
+kern_return_t NotifyServer::DefaultInterface::DoMachNotifyDeadName(
+    notify_port_t notify,
+    mach_port_name_t name,
+    const mach_msg_trailer_t* trailer) {
+  return MIG_BAD_ID;
+}
+
 NotifyServer::NotifyServer(NotifyServer::Interface* interface)
     : MachMessageServer::Interface(),
       interface_(interface) {
diff --git a/util/mach/notify_server.h b/util/mach/notify_server.h
index 311ad3a0..ce33b21b 100644
--- a/util/mach/notify_server.h
+++ b/util/mach/notify_server.h
@@ -37,6 +37,9 @@ class NotifyServer : public MachMessageServer::Interface {
  public:
   //! \brief An interface that the different request messages that are a part of
   //!     the `notify` Mach subsystem can be dispatched to.
+  //!
+  //! Default implementations of all methods are available in the
+  //! DefaultInterface class.
   class Interface {
    public:
     //! \brief Handles port-deleted notifications sent by
@@ -166,6 +169,52 @@ class NotifyServer : public MachMessageServer::Interface {
     ~Interface() {}
   };
 
+  //! \brief A concrete implementation of Interface that provides a default
+  //!     behavior for all `notify` routines.
+  //!
+  //! The Mach `notify` subsystem contains a collection of unrelated routines,
+  //! and a single server would rarely need to implement all of them. To make it
+  //! easier to use NotifyServer, a server can inherit from DefaultInterface
+  //! instead of Interface. Unless overridden, each routine in DefaultInterface
+  //! returns `MIG_BAD_ID` to indicate to the caller that the `notify` message
+  //! was unexpected and not processed.
+  class DefaultInterface : public Interface {
+   public:
+    // Interface:
+
+    kern_return_t DoMachNotifyPortDeleted(
+        notify_port_t notify,
+        mach_port_name_t name,
+        const mach_msg_trailer_t* trailer) override;
+
+    kern_return_t DoMachNotifyPortDestroyed(
+        notify_port_t notify,
+        mach_port_t rights,
+        const mach_msg_trailer_t* trailer,
+        bool* destroy_request) override;
+
+    kern_return_t DoMachNotifyNoSenders(
+        notify_port_t notify,
+        mach_port_mscount_t mscount,
+        const mach_msg_trailer_t* trailer) override;
+
+    kern_return_t DoMachNotifySendOnce(
+        notify_port_t notify,
+        const mach_msg_trailer_t* trailer) override;
+
+    kern_return_t DoMachNotifyDeadName(
+        notify_port_t notify,
+        mach_port_name_t name,
+        const mach_msg_trailer_t* trailer) override;
+
+   protected:
+    DefaultInterface() : Interface() {}
+    ~DefaultInterface() {}
+
+   private:
+    DISALLOW_COPY_AND_ASSIGN(DefaultInterface);
+  };
+
   //! \brief Constructs an object of this class.
   //!
   //! \param[in] interface The interface to dispatch requests to. Weak.