Add cpplint to presubmit input_api

presubmit_support.py

Index: presubmit_support.py
diff --git a/presubmit_support.py b/presubmit_support.py
index 814d3fc37a0d812bbb2bc977293ffe61113eb6d8..e8981e0d75a8d5e326f4105ce8fe836b2578365e 100755
--- a/presubmit_support.py
+++ b/presubmit_support.py
@@ -12,6 +12,7 @@ __version__ = '1.6.1'
 # caching (between all different invocations of presubmit scripts for a given
 # change). We should add it as our presubmit scripts start feeling slow.
 
+import cpplint
 import cPickle  # Exposed through the API.
 import cStringIO  # Exposed through the API.
 import contextlib
@@ -247,6 +248,7 @@ class InputApi(object):
     # so that presubmit scripts don't have to import them.
     self.basename = os.path.basename
     self.cPickle = cPickle
+    self.cpplint = cpplint
     self.cStringIO = cStringIO
     self.glob = glob.glob
     self.json = json
@@ -283,6 +285,16 @@ class InputApi(object):
         fopen=file, os_path=self.os_path, glob=self.glob)
     self.verbose = verbose
 
+    # Replace <hash_map> and <hash_set> as headers that need to be included
+    # with "base/hash_tables.h" instead.
+    # Access to a protected member _XX of a client class
+    # pylint: disable=W0212
+    self.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
+    ]
+
   def PresubmitLocalPath(self):
     """Returns the local path of the presubmit script currently being run.