[Sync] Fix sync lint errors/includes, update presubmit.

components/sync_sessions/PRESUBMIT.py

 # Copyright 2015 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 sync_sessions component.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into depot_tools.
 """
 
 import re
 
 SYNC_SESSIONS_SOURCE_FILES = (r'^components[\\/]sync_sessions[\\/].*\.(cc|h)$',)
 
+# The wrapper around lint that is called below disables a set of filters if the
+# passed filter evaluates to false. Pass a junk filter to avoid this behavior.
+LINT_FILTERS = ['+fake/filter']
+
 def CheckChangeLintsClean(input_api, output_api):
   source_filter = lambda x: input_api.FilterSourceFile(
     x, white_list=SYNC_SESSIONS_SOURCE_FILES, black_list=None)
   return input_api.canned_checks.CheckChangeLintsClean(
-      input_api, output_api, source_filter, lint_filters=[], verbose_level=1)
+      input_api, output_api, source_filter, lint_filters=LINT_FILTERS,
+      verbose_level=1)
 
 def CheckChanges(input_api, output_api):
   results = []
   results += CheckChangeLintsClean(input_api, output_api)
   results += input_api.canned_checks.CheckPatchFormatted(input_api, output_api)
   return results
 
 def CheckChangeOnUpload(input_api, output_api):
   return CheckChanges(input_api, output_api)
 
 def CheckChangeOnCommit(input_api, output_api):
   return CheckChanges(input_api, output_api)