rewrite_to_chrome_style: Improve naming of iterator and type traits.

tools/clang/rewrite_to_chrome_style/tests/fields-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 {
 
 // Note: do not add any copy or move constructors to this class: doing so will
 // break test coverage that we don't clobber the class name by trying to emit
 // replacements for synthesized functions.
 class C {
@@ skipping 39 matching lines @@
 // Unions also use struct-style naming.
 union U {
   char fourChars[4];
   short twoShorts[2];
   int one_hopefully_four_byte_int;
   int m_hasPrefix;
 };
 
 }  // namespace blink
 
+namespace WTF {
+
+struct TypeTrait {
+  // WTF has structs for things like type traits, which we don't want to
+  // capitalize.
+  static const bool value = true;
+};
+
+};  // namespace WTF
+
 void F() {
   // Test that references to a static field are correctly rewritten.
   blink::C::instanceCount++;
   // Force instantiation of a copy constructor for blink::C to make sure field
   // initializers for synthesized functions don't cause weird rewrites.
   blink::C c;
   blink::C c2 = c;
+
+  bool b = WTF::TypeTrait::value;
 }