Enable C++11 in gtest

Change-Id: I2860a34eee12bc2bdb584cc89c871da0ffb127ff

packager/testing/gmock.gyp

@@ -30,6 +30,7 @@
         'gmock/src/gmock-matchers.cc',
         'gmock/src/gmock-spec-builders.cc',
         'gmock/src/gmock.cc',
+        "gmock_custom/gmock/internal/custom/gmock-port.h",
         'gmock_mutant.h',  # gMock helpers
       ],
       'sources!': [
@@ -37,11 +38,13 @@
       ],
       'include_dirs': [
         'gmock',
+        'gmock_custom',
         'gmock/include',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
-          'gmock/include',  # So that gmock headers can find themselves.
+          'gmock_custom',
+          'gmock/include',  # Allow #include <gmock/gmock.h>
         ],
       },
       'export_dependent_settings': [

packager/testing/gmock_custom/gmock/internal/custom/gmock-port.h

@@ -0,0 +1,28 @@
+// Copyright 2017 Google Inc. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef PACKAGER_TESTING_GMOCK_CUSTOM_GMOCK_INTERNAL_CUSTOM_GMOCK_PORT_H_
+#define PACKAGER_TESTING_GMOCK_CUSTOM_GMOCK_INTERNAL_CUSTOM_GMOCK_PORT_H_
+
+#include <type_traits>
+
+namespace std {
+
+// Provide alternative implementation of std::is_default_constructible for
+// old, pre-4.7 of libstdc++, where is_default_constructible is missing.
+// <20120322 below implies pre-4.7.0. In addition we blacklist several version
+// that released after 4.7.0 from pre-4.7.0 branch. 20120702 implies 4.5.4, and
+// 20121127 implies 4.6.4.
+#if defined(__GLIBCXX__) &&                               \
+    (__GLIBCXX__ < 20120322 || __GLIBCXX__ == 20120702 || \
+     __GLIBCXX__ == 20121127)
+template <typename T>
+using is_default_constructible = std::is_constructible<T>;
+#endif
+
+}  // namespace std
+
+#endif  // PACKAGER_TESTING_GMOCK_CUSTOM_GMOCK_INTERNAL_CUSTOM_GMOCK_PORT_H_

packager/testing/gtest.gyp

@@ -25,13 +25,12 @@
         # In order to allow regex matches in gtest to be shared between Windows
         # and other systems, we tell gtest to always use it's internal engine.
         'GTEST_HAS_POSIX_RE=0',
-        # Chrome doesn't support / require C++11, yet.
-        'GTEST_LANG_CXX11=0',
+        'GTEST_LANG_CXX11=1',
       ],
       'all_dependent_settings': {
         'defines': [
           'GTEST_HAS_POSIX_RE=0',
-          'GTEST_LANG_CXX11=0',
+          'GTEST_LANG_CXX11=1',
         ],
       },
       'conditions': [