Move all googletest related scripts into googletest/

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 61df560126145e075bb67c93864b922fad13f6ee..59619ce3506be5c7fef3c49475e24d619caed94b 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -17,6 +17,8 @@ def CommonChecks(input_api, output_api):
   sys_path_backup = sys.path
   try:
     sys.path = [
+      input_api.PresubmitLocalPath(),
+      join('googletest'),
       join('tests', 'gtest_fake'),
     ] + sys.path
     output.extend(input_api.canned_checks.RunPylint(input_api, output_api))
@@ -38,6 +40,12 @@ def CommonChecks(input_api, output_api):
           input_api.os_path.join(input_api.PresubmitLocalPath(), 'tests'),
           whitelist=[r'.+_test\.py$'],
           blacklist=integation_tests))
+  output.extend(
+      input_api.canned_checks.RunUnitTestsInDirectory(
+          input_api, output_api,
+          input_api.os_path.join(
+              input_api.PresubmitLocalPath(), 'googletest', 'tests'),
+          whitelist=[r'.+_test\.py$']))
 
   if input_api.is_committing:
     output.extend(input_api.canned_checks.PanProjectChecks(input_api,