Update Crashpad scripts to python3

Also update mini_chromium to f87a38442a9e for python3 changes.

Change-Id: I4ca7aa4cc9dcc97698fc0bc13cfb339421668074
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/3542572
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>

.gn

@@ -13,3 +13,4 @@
 # limitations under the License.
 
 buildconfig = "//build/BUILDCONFIG.gn"
+script_executable = "python3"

DEPS

@@ -39,7 +39,7 @@ deps = {
       'e1e7b0ad8ee99a875b272c8e33e308472e897660',
   'crashpad/third_party/mini_chromium/mini_chromium':
       Var('chromium_git') + '/chromium/mini_chromium@' +
-      '6e2f204b4ae135c40a6c4b3c3a01f48a86c5e886',
+      'f87a38442a9e7ba88d1c4f479e9167927eae84ed',
   'crashpad/third_party/libfuzzer/src':
       Var('chromium_git') + '/chromium/llvm-project/compiler-rt/lib/fuzzer.git@' +
       'fda403cf93ecb8792cb1d061564d89a6553ca020',
@@ -169,7 +169,7 @@ hooks = [
     'pattern': '.',
     'condition': 'run_setup_ios_gn and checkout_ios',
     'action': [
-        'python',
+        'python3',
         'crashpad/build/ios/setup_ios_gn.py'
     ],
   },

build/ios/convert_gn_xcodeproj.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright 2020 The Crashpad Authors. All rights reserved.
 #

build/ios/setup_ios_gn.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright 2020 The Crashpad Authors. All rights reserved.
 #
@@ -23,29 +23,20 @@ import shutil
 import subprocess
 import sys
 import tempfile
-
-try:
-    import configparser
-except ImportError:
-    import ConfigParser as configparser
-
-try:
-    import StringIO as io
-except ImportError:
-    import io
+import configparser
+import io
 
 SUPPORTED_TARGETS = ('iphoneos', 'iphonesimulator')
 SUPPORTED_CONFIGS = ('Debug', 'Release', 'Profile', 'Official', 'Coverage')
 
 
-class ConfigParserWithStringInterpolation(configparser.SafeConfigParser):
+class ConfigParserWithStringInterpolation(configparser.ConfigParser):
     '''A .ini file parser that supports strings and environment variables.'''
 
     ENV_VAR_PATTERN = re.compile(r'\$([A-Za-z0-9_]+)')
 
     def values(self, section):
-        return map(lambda kv: self._UnquoteString(self._ExpandEnvVar(kv[1])),
-                   configparser.ConfigParser.items(self, section))
+        return [self._UnquoteString(self._ExpandEnvVar(kv[1])) for kv in configparser.ConfigParser.items(self, section)]
 
     def getstring(self, section, option):
         return self._UnquoteString(self._ExpandEnvVar(self.get(section,
@@ -110,7 +101,7 @@ class GnGenerator(object):
             args.append(('target_cpu', target_cpu))
             args.append(
                 ('additional_target_cpus',
-                 [cpu for cpu in cpu_values.itervalues() if cpu != target_cpu]))
+                 [cpu for cpu in cpu_values.values() if cpu != target_cpu]))
         else:
             args.append(('target_cpu', cpu_values[build_arch]))
 

doc/support/generate_doxygen.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright 2017 The Crashpad Authors. All rights reserved.
 #

snapshot/win/end_to_end_test.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright 2015 The Crashpad Authors. All rights reserved.
 #

util/mach/mig.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright 2019 The Crashpad Authors. All rights reserved.
 #

util/mach/mig_fix.py

@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-# coding: utf-8
+#!/usr/bin/env python3
 
 # Copyright 2019 The Crashpad Authors. All rights reserved.
 #

util/mach/mig_gen.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright 2019 The Crashpad Authors. All rights reserved.
 #