Refactor Pickle Read methods to use higher performance PickleIterator.

content/common/pepper_file_messages.h

Index: content/common/pepper_file_messages.h
diff --git a/content/common/pepper_file_messages.h b/content/common/pepper_file_messages.h
index 941824d710f8c83ff6768ade7d16e320b4bef14e..d202d534db6a96739681e40d2e3fe177a8254295 100644
--- a/content/common/pepper_file_messages.h
+++ b/content/common/pepper_file_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.
 
@@ -20,7 +20,7 @@ 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);
 };