remove dead code from devtools worker management

chrome/browser/devtools/devtools_target_impl.h

 // Copyright 2013 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 CHROME_BROWSER_DEVTOOLS_DEVTOOLS_TARGET_IMPL_H_
 #define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_TARGET_IMPL_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 41 matching lines @@
   // Open a new DevTools window or activate the existing one.
   virtual void Inspect(Profile* profile) const;
 
   // Reload the target page.
   virtual void Reload() const;
 
   // Creates a new target associated with RenderViewHost.
   static scoped_ptr<DevToolsTargetImpl> CreateForRenderViewHost(
       content::RenderViewHost*, bool is_tab);
 
-  // Creates a new target associated with a shared worker.
-  static scoped_ptr<DevToolsTargetImpl> CreateForWorker(
-      const content::WorkerService::WorkerInfo&);
-
   typedef std::vector<DevToolsTargetImpl*> List;
   typedef base::Callback<void(const List&)> Callback;
 
   static List EnumerateRenderViewHostTargets();
   static void EnumerateWorkerTargets(Callback callback);
   static void EnumerateAllTargets(Callback callback);
 
  protected:
   scoped_refptr<content::DevToolsAgentHost> agent_host_;
   std::string id_;
   std::string type_;
   std::string title_;
   std::string description_;
   GURL url_;
   GURL favicon_url_;
   base::TimeTicks last_activity_time_;
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_TARGET_IMPL_H_