remove dead code from devtools worker management

content/public/browser/devtools_agent_host.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_DEVTOOLS_AGENT_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_DEVTOOLS_AGENT_HOST_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 19 matching lines @@
 
   // Returns true iff an instance of DevToolsAgentHost for the |rvh|
   // does exist.
   static bool HasFor(RenderViewHost* rvh);
 
   // Returns DevToolsAgentHost that can be used for inspecting shared worker
   // with given worker process host id and routing id.
   static scoped_refptr<DevToolsAgentHost> GetForWorker(int worker_process_id,
                                                        int worker_route_id);
 
-  // Returns true iff an instance of DevToolsAgentHost exists for the shared
-  // worker with given process host id and routing id.
-  static bool HasForWorker(int worker_process_id,
-                           int worker_route_id);
-
   static bool IsDebuggerAttached(WebContents* web_contents);
 
   // Returns a list of all existing RenderViewHost's that can be debugged.
   static std::vector<RenderViewHost*> GetValidRenderViewHosts();
 
   // Returns true if there is a client attached.
   virtual bool IsAttached() = 0;
 
   // Starts inspecting element at position (|x|, |y|) in the specified page.
   virtual void InspectElement(int x, int y) = 0;
@@ skipping 12 matching lines @@
   virtual void ConnectRenderViewHost(RenderViewHost* rvh) = 0;
 
  protected:
   friend class base::RefCounted<DevToolsAgentHost>;
   virtual ~DevToolsAgentHost() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DEVTOOLS_AGENT_HOST_H_