Refactor Pickle Read methods to use higher performance PickleIterator.

ipc/ipc_send_fds_test.cc

Index: ipc/ipc_send_fds_test.cc
diff --git a/ipc/ipc_send_fds_test.cc b/ipc/ipc_send_fds_test.cc
index 3b845f8cf3c24b6acfae103e02ddd686b9de03e4..124a3dcb09271617182563c43f6f09e7c3423194 100644
--- a/ipc/ipc_send_fds_test.cc
+++ b/ipc/ipc_send_fds_test.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 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.
 
@@ -52,7 +52,7 @@ class MyChannelDescriptorListener : public IPC::Channel::Listener {
         num_fds_received_(0) {}
 
   virtual bool OnMessageReceived(const IPC::Message& message) {
-    void* iter = NULL;
+    PickleIterator iter(message);
 
     ++num_fds_received_;
     base::FileDescriptor descriptor;