Refactor Pickle Read methods to use higher performance PickleIterator.

content/browser/renderer_host/render_view_host.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.
 
 #include "content/browser/renderer_host/render_view_host.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 906 matching lines @@
 // notification containing parameters identifying the navigation.
 //
 // Subframes are identified by the page transition type.  For subframes loaded
 // as part of a wider page load, the page_id will be the same as for the top
 // level frame.  If the user explicitly requests a subframe navigation, we will
 // get a new page_id because we need to create a new navigation entry for that
 // action.
 void RenderViewHost::OnMsgNavigate(const IPC::Message& msg) {
   // Read the parameters out of the IPC message directly to avoid making another
   // copy when we filter the URLs.
-  void* iter = NULL;
+  PickleReader iter(msg);
   ViewHostMsg_FrameNavigate_Params validated_params;
   if (!IPC::ParamTraits<ViewHostMsg_FrameNavigate_Params>::
       Read(&msg, &iter, &validated_params))
     return;
 
   // If we're waiting for a cross-site beforeunload ack from this renderer and
   // we receive a Navigate message from the main frame, then the renderer was
   // navigating already and sent it before hearing the ViewMsg_Stop message.
   // We do not want to cancel the pending navigation in this case, since the
   // old page will soon be stopped.  Instead, treat this as a beforeunload ack
@@ skipping 663 matching lines @@
   // Whenever we change swap out state, we should not be waiting for
   // beforeunload or unload acks.  We clear them here to be safe, since they
   // can cause navigations to be ignored in OnMsgNavigate.
   is_waiting_for_beforeunload_ack_ = false;
   is_waiting_for_unload_ack_ = false;
 }
 
 void RenderViewHost::ClearPowerSaveBlockers() {
   STLDeleteValues(&power_save_blockers_);
 }