Refactor Pickle Read methods to use higher performance PickleIterator.

content/common/resource_dispatcher.cc

 // 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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "content/common/resource_dispatcher.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 275 matching lines @@
 
 // ResourceDispatcher implementation ------------------------------------------
 
 bool ResourceDispatcher::OnMessageReceived(const IPC::Message& message) {
   if (!IsResourceDispatcherMessage(message)) {
     return false;
   }
 
   int request_id;
 
-  void* iter = NULL;
+  PickleIterator iter(message);
   if (!message.ReadInt(&iter, &request_id)) {
     NOTREACHED() << "malformed resource message";
     return true;
   }
 
   PendingRequestInfo* request_info = GetPendingRequestInfo(request_id);
   if (!request_info) {
     // Release resources in the message if it is a data message.
     ReleaseResourcesInDataMessage(message);
     return true;
@@ skipping 363 matching lines @@
     default:
       break;
   }
 
   return false;
 }
 
 // static
 void ResourceDispatcher::ReleaseResourcesInDataMessage(
     const IPC::Message& message) {
-  void* iter = NULL;
+  PickleIterator iter(message);
   int request_id;
   if (!message.ReadInt(&iter, &request_id)) {
     NOTREACHED() << "malformed resource message";
     return;
   }
 
   // If the message contains a shared memory handle, we should close the
   // handle or there will be a memory leak.
   if (message.type() == ResourceMsg_DataReceived::ID) {
     base::SharedMemoryHandle shm_handle;
     if (IPC::ParamTraits<base::SharedMemoryHandle>::Read(&message,
                                                          &iter,
                                                          &shm_handle)) {
       base::SharedMemory::CloseHandle(shm_handle);
     }
   }
 }
 
 // static
 void ResourceDispatcher::ReleaseResourcesInMessageQueue(MessageQueue* queue) {
   while (!queue->empty()) {
     IPC::Message* message = queue->front();
     ReleaseResourcesInDataMessage(*message);
     queue->pop_front();
     delete message;
   }
 }