Refactor Pickle Read methods to use higher performance PickleIterator.

chrome/common/automation_messages.h

Index: chrome/common/automation_messages.h
diff --git a/chrome/common/automation_messages.h b/chrome/common/automation_messages.h
index 3d5598ec2d53eda921d72ef9fe618d8e793ca82a..3d4064fa57ca62fdc1189e835b081cb2d27e6392 100644
--- a/chrome/common/automation_messages.h
+++ b/chrome/common/automation_messages.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
@@ -192,7 +192,7 @@ template <>
 struct ParamTraits<ContextMenuModel> {
   typedef ContextMenuModel param_type;
   static void Write(Message* m, const param_type& p);
-  static bool Read(const Message* m, void** iter, param_type* p);
+  static bool Read(const Message* m, PickleIterator* iter, param_type* p);
   static void Log(const param_type& p, std::string* l);
 };