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_;
+// "A" should be considered its own word.
+int nthAValue;
+// "V8" and "Data" should be distinct words.
+int myV8Data;
+// "UTF8" and "Data" should be distinct words.
+int myUTF8Data;
+// "Latin1" and "Data" should be distinct words.
+int myLatin1Data;
+// Identifiers that are all the same case should just be split by underscore,
+// aka assume the human knows what they're doing.
+int GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG;
+int GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
+// Weird edge cases.
+int myDataFromUTF8MaskingTop8Bits;
+bool enableUnsafeES3APIs;
 
 // 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;
 }