Update gtest to 786564fa4a3c, switch to googlemock in gtest

base/strings/nullable_string16_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/strings/nullable_string16.h"
 #include "base/strings/utf_string_conversions.h"
-#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/gtest/googletest/include/gtest/gtest.h"
 
 namespace base {
 
 TEST(NullableString16Test, DefaultConstructor) {
   NullableString16 s;
   EXPECT_TRUE(s.is_null());
   EXPECT_EQ(string16(), s.string());
 }
 
 TEST(NullableString16Test, Equals) {
   NullableString16 a(ASCIIToUTF16("hello"), false);
   NullableString16 b(ASCIIToUTF16("hello"), false);
   EXPECT_EQ(a, b);
 }
 
 TEST(NullableString16Test, NotEquals) {
   NullableString16 a(ASCIIToUTF16("hello"), false);
   NullableString16 b(ASCIIToUTF16("world"), false);
   EXPECT_NE(a, b);
 }
 
 TEST(NullableString16Test, NotEqualsNull) {
   NullableString16 a(ASCIIToUTF16("hello"), false);
   NullableString16 b;
   EXPECT_NE(a, b);
 }
 
 }  // namespace base