Add end of file newline checks to PRESUBMIT.py.

PRESUBMIT_unittest.py

 #!/usr/bin/python
 # Copyright (c) 2009 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.
 
 """Unit tests for top-level Chromium presubmit script.
 """
 
 
 import os
@@ skipping 44 matching lines @@
   def testLocalChecks(self):
     api = MockInputApi()
     api.affected_files = [
       MockAffectedFile('foo/blat/yoo.notsource'),
       MockAffectedFile('third_party/blat/source.cc'),
       MockAffectedFile('foo/blat/source.h'),
       MockAffectedFile('foo/blat/source.mm'),
       MockAffectedFile('foo/blat/source.py'),
     ]
     self.file_contents = 'file with \n\terror\nhere\r\nyes there'
-    # 3 source files, 2 errors by file + 1 global CR error.
-    self.failUnless(len(PRESUBMIT.LocalChecks(api, MockOutputApi)) == 7)
+    # 3 source files, 2 errors by file + 1 global CR  + 1 global EOF error.
+    self.failUnless(len(PRESUBMIT.LocalChecks(api, MockOutputApi)) == 8)
 
-    self.file_contents = 'file\twith\ttabs'
+    self.file_contents = 'file\twith\ttabs\n'
     # 3 source files, 1 error by file.
     self.failUnless(len(PRESUBMIT.LocalChecks(api, MockOutputApi)) == 3)
 
-    self.file_contents = 'file\rusing\rCRs'
+    self.file_contents = 'file\rusing\rCRs\n'
     # One global CR error.
     self.failUnless(len(PRESUBMIT.LocalChecks(api, MockOutputApi)) == 1)
     self.failUnless(
       len(PRESUBMIT.LocalChecks(api, MockOutputApi)[0].items) == 3)
 
-    self.file_contents = 'both\ttabs and\r\nCRLF'
+    self.file_contents = 'both\ttabs and\r\nCRLF\n'
     # 3 source files, 1 error by file + 1 global CR error.
     self.failUnless(len(PRESUBMIT.LocalChecks(api, MockOutputApi)) == 4)
 
-    self.file_contents = 'file with\nzero \\t errors \\r\\n'
+    self.file_contents = 'file with\nzero \\t errors \\r\\n\n'
     self.failIf(PRESUBMIT.LocalChecks(api, MockOutputApi))
 
 
 if __name__ == '__main__':
   unittest.main()