Refactor Pickle Read methods to use higher performance PickleIterator.

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

Index: chrome/browser/ui/views/extensions/browser_action_drag_data.cc
diff --git a/chrome/browser/ui/views/extensions/browser_action_drag_data.cc b/chrome/browser/ui/views/extensions/browser_action_drag_data.cc
index 0a5413f15eaa282ca813fd74d2d237e031ec0dd5..5af522230ce5eeaad6a22b67a3745a9b4bdaa4a1 100644
--- a/chrome/browser/ui/views/extensions/browser_action_drag_data.cc
+++ b/chrome/browser/ui/views/extensions/browser_action_drag_data.cc
@@ -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.
 
@@ -71,7 +71,7 @@ void BrowserActionDragData::WriteToPickle(
 }
 
 bool BrowserActionDragData::ReadFromPickle(Pickle* pickle) {
-  void* data_iterator = NULL;
+  PickleIterator data_iterator(*pickle);
 
   const char* tmp;
   if (!pickle->ReadBytes(&data_iterator, &tmp, sizeof(profile_)))