Remove redundant DevToolsManager methods and clean up its clients.

content/browser/devtools/worker_devtools_manager.cc

 // Copyright (c) 2011 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 "content/browser/devtools/worker_devtools_manager.h"
 
 #include <list>
 #include <map>
 
 #include "base/bind.h"
@@ skipping 148 matching lines @@
   static void WorkerDestroyed(WorkerId id) {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
     AgentHosts::iterator it = g_agent_map.Get().find(id);
     if (it == g_agent_map.Get().end()) {
       RemovePendingWorkerData(id);
       return;
     }
 
     WorkerDevToolsAgentHost* agent = it->second;
     DevToolsManagerImpl* devtools_manager = DevToolsManagerImpl::GetInstance();
-    DevToolsClientHost* client_host =
-        devtools_manager->GetDevToolsClientHostFor(agent);
-
-    if (!client_host) {
+    if (!agent->IsAttached()) {
       // Agent has no client hosts -> delete it.
       RemovePendingWorkerData(id);
       return;
     }
 
     // Client host is debugging this worker agent host.
     devtools_manager->DispatchOnInspectorFrontend(
         agent,
         WebDevToolsAgent::workerDisconnectedFromWorkerEvent().utf8());
     g_orphan_map.Get()[id] = agent;
@@ skipping 255 matching lines @@
     it->second->ConnectionFailed();
 }
 
 // static
 void WorkerDevToolsManager::SendResumeToWorker(const WorkerId& id) {
   if (WorkerProcessHost* process = FindWorkerProcess(id.first))
     process->Send(new DevToolsAgentMsg_ResumeWorkerContext(id.second));
 }
 
 }  // namespace content