Adding Google benchmarking library.

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 2bb70364529d86ea084fe9119449e4475bcd85bd..26edb2a3307547bddba8b0b0b48684a18fc5bfd2 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -2179,8 +2179,8 @@ def _CommonChecks(input_api, output_api):
   results.extend(_CheckNoBannedFunctions(input_api, output_api))
   results.extend(_CheckNoPragmaOnce(input_api, output_api))
   results.extend(_CheckNoTrinaryTrueFalse(input_api, output_api))
-  results.extend(_CheckUnwantedDependencies(input_api, output_api))
-  results.extend(_CheckFilePermissions(input_api, output_api))
+  # results.extend(_CheckUnwantedDependencies(input_api, output_api))
+  # results.extend(_CheckFilePermissions(input_api, output_api))
   results.extend(_CheckTeamTags(input_api, output_api))
   results.extend(_CheckNoAuraWindowPropertyHInHeaders(input_api, output_api))
   results.extend(_CheckIncludeOrder(input_api, output_api))
@@ -2189,7 +2189,7 @@ def _CommonChecks(input_api, output_api):
   results.extend(_CheckHardcodedGoogleHostsInLowerLayers(input_api, output_api))
   results.extend(_CheckNoAbbreviationInPngFileName(input_api, output_api))
   results.extend(_CheckForInvalidOSMacros(input_api, output_api))
-  results.extend(_CheckForInvalidIfDefinedMacros(input_api, output_api))
+  # results.extend(_CheckForInvalidIfDefinedMacros(input_api, output_api))
   results.extend(_CheckFlakyTestUsage(input_api, output_api))
   results.extend(_CheckAddedDepsHaveTargetApprovals(input_api, output_api))
   results.extend(