Refactor Pickle Read methods to use higher performance PickleIterator.

net/http/http_vary_data.h

Index: net/http/http_vary_data.h
diff --git a/net/http/http_vary_data.h b/net/http/http_vary_data.h
index baa4d881a0643beaf9cddd1fc557d0e3d1e5f128..4e7a542c743db7c5d44270adc203210db7e1a060 100644
--- a/net/http/http_vary_data.h
+++ b/net/http/http_vary_data.h
@@ -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.
 
@@ -10,6 +10,7 @@
 #include "net/base/net_export.h"
 
 class Pickle;
+class PickleIterator;
 
 namespace net {
 
@@ -52,7 +53,7 @@ class NET_EXPORT_PRIVATE HttpVaryData {
   // is_valid() will return true.  Otherwise, false is returned to indicate
   // that this object is marked as invalid.
   //
-  bool InitFromPickle(const Pickle& pickle, void** pickle_iter);
+  bool InitFromPickle(const Pickle& pickle, PickleIterator* pickle_iter);
 
   // Call this method to persist the vary data. Illegal to call this on an
   // invalid object.