Check author of a CL agaist the AUTHORS file.

PRESUBMIT.py

Index: PRESUBMIT.py
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 6d19a4e57408d711318a34fcf6b151d6fb66c526..2ab45ad7d29da1e91facc03f54b3fdb6834dd025 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -69,6 +69,7 @@ def _V8PresubmitChecks(input_api, output_api):
   from presubmit import SourceProcessor
   from presubmit import CheckRuntimeVsNativesNameClashes
   from presubmit import CheckExternalReferenceRegistration
+  from presubmit import CheckAuthorizedAuthor
 
   results = []
   if not CppLintProcessor().Run(input_api.PresubmitLocalPath()):
@@ -83,6 +84,7 @@ def _V8PresubmitChecks(input_api, output_api):
   if not CheckExternalReferenceRegistration(input_api.PresubmitLocalPath()):
     results.append(output_api.PresubmitError(
         "External references registration check failed"))
+  results.extend(CheckAuthorizedAuthor(input_api, output_api))
   return results