Added WebKit style to the BasedOnStyle handling and to the relevant help messages.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189765 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/clang-format/clang-format-diff.py b/tools/clang-format/clang-format-diff.py
index bb18730..89fa052 100755
--- a/tools/clang-format/clang-format-diff.py
+++ b/tools/clang-format/clang-format-diff.py
@@ -82,11 +82,13 @@
 
 def main():
   parser = argparse.ArgumentParser(description=
-                                   'Reformat changed lines in diff')
+                                   'Reformat changed lines in diff.')
   parser.add_argument('-p', default=0,
                       help='strip the smallest prefix containing P slashes')
-  parser.add_argument('-style',
-                      help='formatting style to apply (LLVM, Google, Chromium)')
+  parser.add_argument(
+      '-style',
+      help=
+      'formatting style to apply (LLVM, Google, Chromium, Mozilla, WebKit)')
   args = parser.parse_args()
 
   filename = None