Switch googletest and googlemock to pull from the GitHub git repository

DEPS

 # Copyright 2014 The Crashpad Authors. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
 vars = {
   'chromium_git': 'https://chromium.googlesource.com',
 }
 
 deps = {
-  'crashpad/third_party/gmock/gmock':
-      Var('chromium_git') + '/external/gmock@' +
-      '29763965ab52f24565299976b936d1265cb6a271',  # svn r501
   'crashpad/third_party/gtest/gtest':
-      Var('chromium_git') + '/external/gtest@' +
-      '8245545b6dc9c4703e6496d1efd19e975ad2b038',  # svn r700
+      Var('chromium_git') + '/external/github.com/google/googletest@' +
+      '71a26ac68b28c61686b8941730a6b2577912e239',
   'crashpad/third_party/gyp/gyp':
       Var('chromium_git') + '/external/gyp@' +
       '01528c7244837168a1c80f06ff60fa5a9793c824',
   'crashpad/third_party/mini_chromium/mini_chromium':
       Var('chromium_git') + '/chromium/mini_chromium@' +
       'ea8d8de53f9407d57cab716fef2a36b6bf1b78b2',
   'buildtools':
       Var('chromium_git') + '/chromium/buildtools.git@' +
       'c2f259809d5ede3275df5ea0842f0431990c4f98',
 }
@@ skipping 26 matching lines @@
       '--sha1_file',
       'buildtools/win/clang-format.exe.sha1',
     ],
   },
   {
     'name': 'gyp',
     'pattern': '\.gypi?$',
     'action': ['python', 'crashpad/build/gyp_crashpad.py'],
   },
 ]