replace OVERRIDE and FINAL with override and final in cc/

cc/PRESUBMIT.py

Index: cc/PRESUBMIT.py
diff --git a/cc/PRESUBMIT.py b/cc/PRESUBMIT.py
index f381684bfbc991e110a1087f2e9b750cb255e530..d749aac40ac66de1e0bdaf461a7e0f88492d9096 100644
--- a/cc/PRESUBMIT.py
+++ b/cc/PRESUBMIT.py
@@ -313,6 +313,42 @@ def CheckForUseOfWrongClock(input_api,
   else:
     return []
 
+def CheckOverrideFinal(input_api, output_api,
+                       whitelist=CC_SOURCE_FILES, blacklist=None):
+  """Make sure new lines of code don't use the OVERRIDE or FINAL macros."""
+
+  # TODO(mostynb): remove this check once the macros are removed
+  # from base/compiler_specific.h.
+
+  errors = []
+
+  source_file_filter = lambda x: input_api.FilterSourceFile(
+    x, white_list=CC_SOURCE_FILES, black_list=None)
+
+  override_files = []
+  final_files = []
+
+  for f in input_api.AffectedSourceFiles(source_file_filter):
+    contents = input_api.ReadFile(f, 'rb')
+
+    # "override" and "final" should be used instead of OVERRIDE/FINAL now.
+    if re.search(r"\bOVERRIDE\b", contents):
+      override_files.append(f.LocalPath())
+
+    if re.search(r"\bFINAL\b", contents):
+      final_files.append(f.LocalPath())
+
+  if override_files:
+    return [output_api.PresubmitError(
+      'These files use OVERRIDE instead of using override:',
+      items=override_files)]
+  if final_files:
+    return [output_api.PresubmitError(
+      'These files use FINAL instead of using final:',
+      items=final_files)]
+
+  return []
+
 def CheckChangeOnUpload(input_api, output_api):
   results = []
   results += CheckAsserts(input_api, output_api)
@@ -324,6 +360,7 @@ def CheckChangeOnUpload(input_api, output_api):
   results += CheckNamespace(input_api, output_api)
   results += CheckForUseOfWrongClock(input_api, output_api)
   results += FindUselessIfdefs(input_api, output_api)
+  results += CheckOverrideFinal(input_api, output_api)
   results += input_api.canned_checks.CheckPatchFormatted(input_api, output_api)
   return results