Extract minimal RenderViewHost interface for embedders, leaving

chrome/browser/extensions/extension_debugger_api.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.
 
 // Implements the Chrome Extensions Debugger API.
 
 #include "chrome/browser/extensions/extension_debugger_api.h"
 
 #include <map>
 #include <set>
 
@@ skipping 130 matching lines @@
 
   ExtensionDevToolsClientHost* Lookup(WebContents* contents) {
     for (std::set<DevToolsClientHost*>::iterator it = client_hosts_.begin();
          it != client_hosts_.end(); ++it) {
       DevToolsAgentHost* agent_host =
           DevToolsManager::GetInstance()->GetDevToolsAgentHostFor(*it);
       if (!agent_host)
         continue;
       RenderViewHost* rvh =
           DevToolsAgentHostRegistry::GetRenderViewHost(agent_host);
-      if (rvh && rvh->delegate() &&
-          rvh->delegate()->GetAsWebContents() == contents)
+      if (rvh && rvh->GetDelegate() &&
+          rvh->GetDelegate()->GetAsWebContents() == contents)
         return static_cast<ExtensionDevToolsClientHost*>(*it);
     }
     return NULL;
   }
 
  private:
   std::set<DevToolsClientHost*> client_hosts_;
 };
 
 }  // namespace
@@ skipping 322 matching lines @@
     return;
   }
 
   Value* result_body;
   if (dictionary->Get("result", &result_body))
     result_.reset(result_body->DeepCopy());
   else
     result_.reset(new DictionaryValue());
   SendResponse(true);
 }