Roll googletest to 1.8.0+.

third_party/googletest/BUILD.gn

 # Copyright 2014 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.
 
 config("gtest_config") {
   visibility = [ ":*" ]  # gmock also shares this config.
 
   defines = [
+    # Chromium always links googletest statically, so no API qualifier is
+    # necessary. The definition in gtest-port.h at the time of this writing
+    # causes crashes in content_browsertests.
+    "GTEST_API_=",
+
     # In order to allow regex matches in gtest to be shared between Windows
     # and other systems, we tell gtest to always use its internal engine.
     "GTEST_HAS_POSIX_RE=0",
     "GTEST_LANG_CXX11=1",
   ]
 
   # Gtest headers need to be able to find themselves.
   include_dirs = [ "src/googletest/include" ]
 
   if (is_win) {
     cflags = [ "/wd4800" ]  # Unused variable warning.
   }
 }
 
 config("gmock_config") {
   # Gmock headers need to be able to find themselves.
   include_dirs = [
-    "gmock_custom",
+    "custom",
     "src/googlemock/include",
   ]
 }
 
 # Do NOT depend on this directly. Use //testing/gtest instead.
 # See README.chromium for details.
 source_set("gtest") {
   testonly = true
   sources = [
     "src/googletest/include/gtest/gtest-death-test.h",
@@ skipping 60 matching lines @@
     "src/googlemock/include/gmock/gmock-generated-matchers.h",
     "src/googlemock/include/gmock/gmock-generated-nice-strict.h",
     "src/googlemock/include/gmock/gmock-matchers.h",
     "src/googlemock/include/gmock/gmock-spec-builders.h",
     "src/googlemock/include/gmock/gmock.h",
     "src/googlemock/include/gmock/internal/gmock-generated-internal-utils.h",
     "src/googlemock/include/gmock/internal/gmock-internal-utils.h",
     "src/googlemock/include/gmock/internal/gmock-port.h",
 
     # gmock helpers.
-    "gmock_custom/gmock/internal/custom/gmock-port.h",
+    "custom/gmock/internal/custom/gmock-port.h",
 
     #"src/googlemock/src/gmock-all.cc",  # Not needed by our build.
     "src/googlemock/src/gmock-cardinalities.cc",
     "src/googlemock/src/gmock-internal-utils.cc",
     "src/googlemock/src/gmock-matchers.cc",
     "src/googlemock/src/gmock-spec-builders.cc",
     "src/googlemock/src/gmock.cc",
   ]
 
-  # This project includes some stuff form gtest's guts.
-  include_dirs = [ "src/googletest/include" ]
-
   public_configs = [
     ":gmock_config",
     ":gtest_config",
   ]
 }
 
 # Do NOT depend on this directly. Use //testing/gmock:gmock_main instead.
 # See README.chromium for details.
 static_library("gmock_main") {
   testonly = true
   sources = [
     "src/googlemock/src/gmock_main.cc",
   ]
   deps = [
     ":gmock",
   ]
 }