Cleanup: Presubmit API is built into depot_tools.

chrome/PRESUBMIT.py

 # Copyright (c) 2011 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.
 
 """Presubmit script for changes affecting chrome/
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
-for more details about the presubmit API built into gcl.
+for more details about the presubmit API built into depot_tools.
 """
 
 import re
 
 INCLUDE_CPP_FILES_ONLY = (
   r'.*\.cc$', r'.*\.h$'
 )
 
 EXCLUDE = (
   # Objective C confuses everything.
@@ skipping 47 matching lines @@
 def CheckChangeOnUpload(input_api, output_api):
   results = []
   results.extend(_CommonChecks(input_api, output_api))
   results.extend(_CheckChangeLintsClean(input_api, output_api))
   return results
 
 def CheckChangeOnCommit(input_api, output_api):
   results = []
   results.extend(_CommonChecks(input_api, output_api))
   return results