Refactor Pickle Read methods to use higher performance PickleIterator.

chrome/common/render_messages.cc

Index: chrome/common/render_messages.cc
diff --git a/chrome/common/render_messages.cc b/chrome/common/render_messages.cc
index 726f082680cff075aed2ab735233e7dfac937382..ce17fa34c05387d5160474e058a9d074f7b299bc 100644
--- a/chrome/common/render_messages.cc
+++ b/chrome/common/render_messages.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.
 
@@ -12,7 +12,7 @@ void ParamTraits<ContentSettingsPattern>::Write(
 }
 
 bool ParamTraits<ContentSettingsPattern>::Read(
-    const Message* m, void** iter, ContentSettingsPattern* pattern) {
+    const Message* m, PickleIterator* iter, ContentSettingsPattern* pattern) {
   return pattern->ReadFromMessage(m, iter);
 }