Teach cpplint include-what-you-use about chromium hash_set and hash_map.

presubmit_canned_checks.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.
 
 """Generic presubmit checks that can be reused by other presubmit checks."""
 
 import os as _os
 _HERE = _os.path.dirname(_os.path.abspath(__file__))
 
 
@@ skipping 96 matching lines @@
   # - build/include_order : Not happening; #ifdefed includes.
   # - build/namespace     : I'm surprised by how often we violate this rule.
   # - readability/casting : Mistakes a whole bunch of function pointer.
   # - runtime/int         : Can be fixed long term; volume of errors too high
   # - runtime/virtual     : Broken now, but can be fixed in the future?
   # - whitespace/braces   : We have a lot of explicit scoping in chrome code.
   cpplint._SetFilters('-build/include,-build/include_order,-build/namespace,'
                       '-readability/casting,-runtime/int,-runtime/virtual,'
                       '-whitespace/braces')
 
+  # Replace <hash_map> and <hash_set> as headers that need to be included
+  # with "base/hash_tables.h" instead.
+  cpplint._re_pattern_templates = [
+    (a, b, 'base/hash_tables.h')
+      if header in ('<hash_map>', '<hash_set>') else (a, b, header)
+    for (a, b, header) in cpplint._re_pattern_templates
+  ]
+
   # We currently are more strict with normal code than unit tests; 4 and 5 are
   # the verbosity level that would normally be passed to cpplint.py through
   # --verbose=#. Hopefully, in the future, we can be more verbose.
   files = [f.AbsoluteLocalPath() for f in
            input_api.AffectedSourceFiles(source_file_filter)]
   for file_name in files:
     if _RE_IS_TEST.match(file_name):
       level = 5
     else:
       level = 4
@@ skipping 880 matching lines @@
     snapshot("checking description")
     results.extend(input_api.canned_checks.CheckChangeHasDescription(
         input_api, output_api))
     results.extend(input_api.canned_checks.CheckDoNotSubmitInDescription(
         input_api, output_api))
     snapshot("checking do not submit in files")
     results.extend(input_api.canned_checks.CheckDoNotSubmitInFiles(
         input_api, output_api))
   snapshot("done")
   return results