Refactor Pickle Read methods to use higher performance PickleIterator.

ppapi/proxy/serialized_flash_menu.h

Index: ppapi/proxy/serialized_flash_menu.h
diff --git a/ppapi/proxy/serialized_flash_menu.h b/ppapi/proxy/serialized_flash_menu.h
index 4be22bf59104d97f35a8596926f63a21f90044a0..f7ad6b6270cdca17f2577184bd449c46f919e94d 100644
--- a/ppapi/proxy/serialized_flash_menu.h
+++ b/ppapi/proxy/serialized_flash_menu.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.
 
@@ -12,6 +12,8 @@
 #include "base/memory/scoped_ptr.h"
 #include "ppapi/proxy/ppapi_proxy_export.h"
 
+class PickleIterator;
+
 struct PP_Flash_Menu;
 
 namespace IPC {
@@ -31,7 +33,7 @@ class PPAPI_PROXY_EXPORT SerializedFlashMenu {
   const PP_Flash_Menu* pp_menu() const { return pp_menu_; }
 
   void WriteToMessage(IPC::Message* m) const;
-  bool ReadFromMessage(const IPC::Message* m, void** iter);
+  bool ReadFromMessage(const IPC::Message* m, PickleIterator* iter);
 
  private:
   const PP_Flash_Menu* pp_menu_;