Blacklist .diff and .patch files

Otherwise, silly checks like EOL whitespace triggers constantly.

R=dpranke@chromium.org
BUG=
TEST=


Review URL: http://codereview.chromium.org/8494013

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@108899 0039d316-1c4b-4281-b951-d872f2087c98

presubmit_support.py

@@ -216,6 +216,9 @@ class InputApi(object):
       # SCM (can happen in dual SCM configuration). (Slightly over aggressive)
       r"(|.*[\\\/])\.git[\\\/].*",
       r"(|.*[\\\/])\.svn[\\\/].*",
+      # There is no point in processing a patch file.
+      r".+\.diff$",
+      r".+\.patch$",
   )
 
   def __init__(self, change, presubmit_path, is_committing,

tests/presubmit_unittest.py

@@ -1020,6 +1020,8 @@ class InputApiUnittest(PresubmitTestsBase):
           f('b.c/.git'),
           f('a/.git/bleh.py'),
           f('.git/bleh.py'),
+          f('bleh.diff'),
+          f('foo/bleh.patch'),
         ],
         [
           # Expected.
@@ -1031,7 +1033,7 @@ class InputApiUnittest(PresubmitTestsBase):
     self.mox.ReplayAll()
 
     self.assertEqual(len(input_api.DEFAULT_WHITE_LIST), 21)
-    self.assertEqual(len(input_api.DEFAULT_BLACK_LIST), 9)
+    self.assertEqual(len(input_api.DEFAULT_BLACK_LIST), 11)
     for item in files:
       results = filter(input_api.FilterSourceFile, item[0])
       for i in range(len(results)):