Clean up rewrite_to_chrome_style naming logic.

tools/clang/rewrite_to_chrome_style/tests/variables-original.cc

 // Copyright 2015 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.
 
 namespace blink {
 
 // Global variables
 int frameCount = 0;
 // Make sure that underscore-insertion doesn't get too confused by acronyms.
 static int variableMentioningHTTPAndHTTPS = 1;
 // Already Google style, should not change.
 int already_google_style_;
+// Should still get normalized.
+int Goofily_named_VARIABLE_for_FUN_;
 
 // Function parameters
 int function(int interestingNumber) {
   // Local variables.
   int aLocalVariable = 1;
   // Static locals.
   static int aStaticLocalVariable = 2;
   // Make sure references to variables are also rewritten.
   return frameCount +
          variableMentioningHTTPAndHTTPS * interestingNumber / aLocalVariable %
              aStaticLocalVariable;
 }
 
 }  // namespace blink
 
 int F() {
   // Make sure variables qualified with a namespace name are still rewritten
   // correctly.
   return blink::frameCount;
 }