Use GTEST_LANG_CXX11 in V8

For GYP build, V8 configures gtest and gmock in its //testing, and OTOH for
GN build, it imports BUILD.gn from chromium and uses other configurations
from its own. However, a recent chromium change on the BUILD.gn requires
//testing update too. That prevents //build roll of V8.

BUG=chromium:630299

Review-Url: https://codereview.chromium.org/2179743002
Cr-Commit-Position: refs/heads/master@{#38021}

testing/gmock.gyp

@@ -31,16 +31,19 @@
         'gmock/src/gmock-spec-builders.cc',
         'gmock/src/gmock.cc',
         'gmock-support.h',  # gMock helpers
+        'gmock_custom/gmock/internal/custom/gmock-port.h',
       ],
       'sources!': [
         'gmock/src/gmock-all.cc',  # Not needed by our build.
       ],
       'include_dirs': [
+        'gmock_custom',
         'gmock',
         'gmock/include',
       ],
-      'direct_dependent_settings': {
+      'all_dependent_settings': {
         'include_dirs': [
+          'gmock_custom',
           'gmock/include',  # So that gmock headers can find themselves.
         ],
       },

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

@@ -0,0 +1,29 @@
+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Copied from http://crrev.com/6ad76b419eacefc4/testing/gmock_custom/gmock/internal/custom/gmock-port.h
+
+#ifndef TESTING_GMOCK_CUSTOM_GMOCK_INTERNAL_CUSTOM_GMOCK_PORT_H_
+#define 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
+
+}
+
+#endif  // TESTING_GMOCK_CUSTOM_GMOCK_INTERNAL_CUSTOM_GMOCK_PORT_H_

testing/gtest.gyp

@@ -53,33 +53,15 @@
         # 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': [
-        ['os_posix == 1', {
-          'defines': [
-            # gtest isn't able to figure out when RTTI is disabled for gcc
-            # versions older than 4.3.2, and assumes it's enabled.  Our Mac
-            # and Linux builds disable RTTI, and cannot guarantee that the
-            # compiler will be 4.3.2. or newer.  The Mac, for example, uses
-            # 4.2.1 as that is the latest available on that platform.  gtest
-            # must be instructed that RTTI is disabled here, and for any
-            # direct dependents that might include gtest headers.
-            'GTEST_HAS_RTTI=0',
-          ],
-          'direct_dependent_settings': {
-            'defines': [
-              'GTEST_HAS_RTTI=0',
-            ],
-          },
-        }],
         ['OS=="android"', {
           'defines': [
             'GTEST_HAS_CLONE=0',
@@ -90,25 +72,6 @@
             ],
           },
         }],
-        ['OS=="android"', {
-          # We want gtest features that use tr1::tuple, but we currently
-          # don't support the variadic templates used by libstdc++'s
-          # implementation. gtest supports this scenario by providing its
-          # own implementation but we must opt in to it.
-          'defines': [
-            'GTEST_USE_OWN_TR1_TUPLE=1',
-            # GTEST_USE_OWN_TR1_TUPLE only works if GTEST_HAS_TR1_TUPLE is set.
-            # gtest r625 made it so that GTEST_HAS_TR1_TUPLE is set to 0
-            # automatically on android, so it has to be set explicitly here.
-            'GTEST_HAS_TR1_TUPLE=1',
-          ],
-          'direct_dependent_settings': {
-            'defines': [
-              'GTEST_USE_OWN_TR1_TUPLE=1',
-              'GTEST_HAS_TR1_TUPLE=1',
-            ],
-          },
-        }],
       ],
       'direct_dependent_settings': {
         'defines': [