Refactor Pickle Read methods to use higher performance PickleIterator.

chrome/browser/ui/views/extensions/browser_action_drag_data.cc

-// 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.
 
 #include "chrome/browser/ui/views/extensions/browser_action_drag_data.h"
 
 #include "base/logging.h"
 #include "base/pickle.h"
 #include "base/string_util.h"
 #include "chrome/browser/profiles/profile.h"
 
@@ skipping 52 matching lines @@
 #endif
 
 void BrowserActionDragData::WriteToPickle(
     Profile* profile, Pickle* pickle) const {
   pickle->WriteBytes(&profile, sizeof(profile));
   pickle->WriteString(id_);
   pickle->WriteSize(index_);
 }
 
 bool BrowserActionDragData::ReadFromPickle(Pickle* pickle) {
-  void* data_iterator = NULL;
+  PickleIterator data_iterator(*pickle);
 
   const char* tmp;
   if (!pickle->ReadBytes(&data_iterator, &tmp, sizeof(profile_)))
     return false;
   memcpy(&profile_, tmp, sizeof(profile_));
 
   if (!pickle->ReadString(&data_iterator, &id_))
     return false;
 
   if (!pickle->ReadSize(&data_iterator, &index_))
     return false;
 
   return true;
 }