Refactor Pickle Read methods to use higher performance PickleIterator.

chrome/common/render_messages.h

Index: chrome/common/render_messages.h
diff --git a/chrome/common/render_messages.h b/chrome/common/render_messages.h
index d6186b777e89d6226c1bb425e8a6e9f165c7a007..44933a6396931a09644c441d334a937657557b9e 100644
--- a/chrome/common/render_messages.h
+++ b/chrome/common/render_messages.h
@@ -85,7 +85,7 @@ struct ParamTraits<gfx::NativeView> {
     NOTIMPLEMENTED();
   }
 
-  static bool Read(const Message* m, void** iter, param_type* p) {
+  static bool Read(const Message* m, PickleIterator* iter, param_type* p) {
     NOTIMPLEMENTED();
     *p = NULL;
     return true;
@@ -102,7 +102,7 @@ template <>
 struct ParamTraits<ContentSettingsPattern> {
   typedef ContentSettingsPattern param_type;
   static void Write(Message* m, const param_type& p);
-  static bool Read(const Message* m, void** iter, param_type* r);
+  static bool Read(const Message* m, PickleIterator* iter, param_type* r);
   static void Log(const param_type& p, std::string* l);
 };