Refactor Pickle Read methods to use higher performance PickleIterator.

content/common/pepper_file_messages.h

-// 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.
 
 // Multiply-included message file, no traditional include guard.
 #include "content/public/common/common_param_traits.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_param_traits.h"
 #include "ipc/ipc_platform_file.h"
 #include "webkit/plugins/ppapi/dir_contents.h"
 #include "webkit/plugins/ppapi/file_path.h"
 
 // Singly-included section since need custom serialization.
 #ifndef CONTENT_COMMON_PEPPER_FILE_MESSAGES_H_
 #define CONTENT_COMMON_PEPPER_FILE_MESSAGES_H_
 
 namespace IPC {
 
 template <>
 struct ParamTraits<webkit::ppapi::PepperFilePath> {
   typedef webkit::ppapi::PepperFilePath 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);
 };
 
 }  // namespace IPC
 
 #endif  // CONTENT_COMMON_PEPPER_FILE_MESSAGES_H_
 
 #define IPC_MESSAGE_START PepperFileMsgStart
 
 IPC_STRUCT_TRAITS_BEGIN(webkit::ppapi::DirEntry)
@@ skipping 32 matching lines @@
                             webkit::ppapi::PepperFilePath /* path */,
                             base::PlatformFileInfo, /* info */
                             base::PlatformFileError /* error_code */)
 
 // Get the directory's contents.
 IPC_SYNC_MESSAGE_CONTROL1_2(PepperFileMsg_GetDirContents,
                             webkit::ppapi::PepperFilePath /* path */,
                             webkit::ppapi::DirContents, /* contents */
                             base::PlatformFileError /* error_code */)