Roll googletest to 1.8.0.

build/secondary/testing/gmock/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.
 
+# Chromium's GN configuration for gmock now lives at testing/gmock/BUILD.gn.
+#
+# This configuration is left in the tree because it is pulled by V8 and PDFium,
+# and will be removed as soon as the projects switch off of it.
+#
+# Details at http://crbug.com/630705 and http://crrev.com/2779193002
+
 config("gmock_config") {
   # Gmock headers need to be able to find themselves.
   include_dirs = [
     "//testing/gmock_custom",
     "include",
   ]
 }
 
 static_library("gmock") {
   testonly = true
@@ skipping 34 matching lines @@
 
 static_library("gmock_main") {
   testonly = true
   sources = [
     "src/gmock_main.cc",
   ]
   deps = [
     ":gmock",
   ]
 }