rewrite_to_chrome_style: Improve naming of iterator and type traits.

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

Index: tools/clang/rewrite_to_chrome_style/tests/fields-original.cc
diff --git a/tools/clang/rewrite_to_chrome_style/tests/fields-original.cc b/tools/clang/rewrite_to_chrome_style/tests/fields-original.cc
index ac3e8794fc060e5a4add36d2580bf13c2d17f5ee..32e5d8155a57b48e0e3ccc30a043e2d5a1fcf2a8 100644
--- a/tools/clang/rewrite_to_chrome_style/tests/fields-original.cc
+++ b/tools/clang/rewrite_to_chrome_style/tests/fields-original.cc
@@ -57,6 +57,16 @@ union U {
 
 }  // 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++;
@@ -64,4 +74,6 @@ void F() {
   // initializers for synthesized functions don't cause weird rewrites.
   blink::C c;
   blink::C c2 = c;
+
+  bool b = WTF::TypeTrait::value;
 }