cc: Ban DLOG/LOG(INFO) from cc via presubmit

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
 details on the presubmit API built into gcl.
 """
 
@@ skipping 20 matching lines @@
   if assert_files:
     return [output_api.PresubmitError(
       'These files use ASSERT instead of using DCHECK:',
       items=assert_files)]
   if notreached_files:
     return [output_api.PresubmitError(
       'These files use ASSERT_NOT_REACHED instead of using NOTREACHED:',
       items=notreached_files)]
   return []
 
+def CheckSpamLogging(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)
+
+  bad_files = []
+
+  for f in input_api.AffectedSourceFiles(source_file_filter):
+    contents = input_api.ReadFile(f, 'rb')
+    if re.search(r"\bD?LOG\s*\(\s*INFO\s*\)", contents):
+      bad_files.append(f.LocalPath())
+
+  if bad_files:
+    return [output_api.PresubmitError(
+      'These files spam the console log with LOG(INFO):',
+      items=bad_files)]
+  return []
+
+
 def CheckChangeOnUpload(input_api, output_api):
   results = []
   results += CheckAsserts(input_api, output_api)
+  results += CheckSpamLogging(input_api, output_api)
   return results
 
 def GetPreferredTrySlaves(project, change):
   return [
     'linux_layout_rel',
     ]