remove dead code from devtools worker management

chrome/browser/devtools/devtools_target_impl.cc

 // 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.
 
 #include "chrome/browser/devtools/devtools_target_impl.h"
 
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/extensions/extension_host.h"
@@ skipping 257 matching lines @@
 void DevToolsTargetImpl::Reload() const {
 }
 
 // static
 scoped_ptr<DevToolsTargetImpl> DevToolsTargetImpl::CreateForRenderViewHost(
     content::RenderViewHost* rvh, bool is_tab) {
   return scoped_ptr<DevToolsTargetImpl>(new RenderViewHostTarget(rvh, is_tab));
 }
 
 // static
-scoped_ptr<DevToolsTargetImpl> DevToolsTargetImpl::CreateForWorker(
-    const WorkerService::WorkerInfo& worker_info) {
-  return scoped_ptr<DevToolsTargetImpl>(new WorkerTarget(worker_info));
-}
-
-// static
 DevToolsTargetImpl::List DevToolsTargetImpl::EnumerateRenderViewHostTargets() {
   std::set<RenderViewHost*> tab_rvhs;
   for (TabContentsIterator it; !it.done(); it.Next())
     tab_rvhs.insert(it->GetRenderViewHost());
 
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DevToolsTargetImpl::List result;
   std::vector<RenderViewHost*> rvh_list =
       content::DevToolsAgentHost::GetValidRenderViewHosts();
   for (std::vector<RenderViewHost*>::iterator it = rvh_list.begin();
@@ skipping 38 matching lines @@
 
 // static
 void DevToolsTargetImpl::EnumerateAllTargets(Callback callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   content::BrowserThread::PostTask(
       content::BrowserThread::IO,
       FROM_HERE,
       base::Bind(&DevToolsTargetImpl::EnumerateWorkerTargets,
                  base::Bind(&CollectAllTargets, callback)));
 }