cc: Replace > > with >>

cc/PRESUBMIT.py

 # Copyright (c) 2012 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.
 
 """Top-level presubmit script for cc.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into depot_tools.
 """
 
@@ skipping 132 matching lines @@
     if ('FIX'+'ME') in contents:
       errors.append(f.LocalPath())
 
   if errors:
     return [output_api.PresubmitError(
       'All TODO comments should be of the form TODO(name). ' +
       'Use TODO instead of FIX' + 'ME',
       items=errors)]
   return []
 
+def CheckDoubleAngles(input_api, output_api, white_list=CC_SOURCE_FILES,
+                      black_list=None):
+  errors = []
+
+  source_file_filter = lambda x: input_api.FilterSourceFile(x,
+                                                            white_list,
+                                                            black_list)
+  for f in input_api.AffectedSourceFiles(source_file_filter):
+    contents = input_api.ReadFile(f, 'rb')
+    if ('> >') in contents:
+      errors.append(f.LocalPath())
+
+  if errors:
+    return [output_api.PresubmitError('Use >> instead of > >:', items=errors)]
+  return []
+
 def CheckScopedPtr(input_api, output_api,
                    white_list=CC_SOURCE_FILES, black_list=None):
   black_list = tuple(black_list or input_api.DEFAULT_BLACK_LIST)
   source_file_filter = lambda x: input_api.FilterSourceFile(x,
                                                             white_list,
                                                             black_list)
   errors = []
   for f in input_api.AffectedSourceFiles(source_file_filter):
     for line_number, line in f.ChangedContents():
       # Disallow:
@@ skipping 189 matching lines @@
 
   return []
 
 def CheckChangeOnUpload(input_api, output_api):
   results = []
   results += CheckAsserts(input_api, output_api)
   results += CheckStdAbs(input_api, output_api)
   results += CheckPassByValue(input_api, output_api)
   results += CheckChangeLintsClean(input_api, output_api)
   results += CheckTodos(input_api, output_api)
+  results += CheckDoubleAngles(input_api, output_api)
   results += CheckScopedPtr(input_api, output_api)
   results += CheckNamespace(input_api, output_api)
   results += CheckForUseOfWrongClock(input_api, output_api)
   results += FindUselessIfdefs(input_api, output_api)
   results += CheckOverrideFinal(input_api, output_api)
   results += input_api.canned_checks.CheckPatchFormatted(input_api, output_api)
   return results
 
 def GetPreferredTryMasters(project, change):
   return {
     'tryserver.blink': {
       'linux_blink_rel': set(['defaulttests']),
     },
     'tryserver.chromium.gpu': {
       'linux_gpu': set(['defaulttests']),
       'mac_gpu': set(['defaulttests']),
       'win_gpu': set(['defaulttests']),
     },
   }