Refactor Pickle Read methods to use higher performance PickleIterator.

chrome/common/common_param_traits.cc

-// 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.
 
 #include "chrome/common/common_param_traits.h"
 
 #include "ipc/ipc_message.h"
 #include "ipc/ipc_message_utils.h"
 
 namespace IPC {
 
 void ParamTraits<ContentSetting>::Write(Message* m, const param_type& p) {
   m->WriteInt(static_cast<int>(p));
 }
 
-bool ParamTraits<ContentSetting>::Read(const Message* m, void** iter,
+bool ParamTraits<ContentSetting>::Read(const Message* m, PickleIterator* iter,
                                        param_type* p) {
   int type;
   if (!m->ReadInt(iter, &type))
     return false;
   *p = static_cast<param_type>(type);
   return true;
 }
 
 void ParamTraits<ContentSetting>::Log(const param_type& p, std::string* l) {
   std::string content_setting;
@@ skipping 17 matching lines @@
       content_setting = "UNKNOWN";
       break;
   }
   LogParam(content_setting, l);
 }
 
 void ParamTraits<ContentSettingsType>::Write(Message* m, const param_type& p) {
   m->WriteInt(static_cast<int>(p));
 }
 
-bool ParamTraits<ContentSettingsType>::Read(const Message* m, void** iter,
-                                       param_type* p) {
+bool ParamTraits<ContentSettingsType>::Read(const Message* m,
+                                            PickleIterator* iter,
+                                            param_type* p) {
   int type;
   if (!m->ReadInt(iter, &type))
     return false;
   *p = static_cast<param_type>(type);
   return true;
 }
 
 void ParamTraits<ContentSettingsType>::Log(const param_type& p,
                                            std::string* l) {
   std::string setting_type;
@@ skipping 26 matching lines @@
       setting_type = "CONTENT_SETTINGS_TYPE_INTENTS";
       break;
     default:
       setting_type = "UNKNOWN";
       break;
   }
   LogParam(setting_type, l);
 }
 
 }  // namespace IPC