DevTools: Never instantiate DevToolsAgentHost on threads other than UI

chrome/browser/extensions/api/debugger/debugger_api.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.
 
 // Defines the Chrome Extensions Debugger API functions for attaching debugger
 // to the page.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_DEBUGGER_DEBUGGER_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_DEBUGGER_DEBUGGER_API_H_
 
 #include <string>
 
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/common/extensions/api/debugger.h"
+#include "content/public/browser/worker_service.h"
 
 using extensions::api::debugger::Debuggee;
 
 // Base debugger function.
 
 class ExtensionDevToolsClientHost;
 
 namespace base {
 class DictionaryValue;
 }
@@ skipping 68 matching lines @@
 
   DebuggerGetTargetsFunction();
 
  protected:
   virtual ~DebuggerGetTargetsFunction();
 
   // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
 
  private:
-  void CollectWorkerInfo(base::ListValue* list);
+  typedef std::vector<content::WorkerService::WorkerInfo> WorkerInfoList;
 
-  void SendTargetList(base::ListValue* list);
+  WorkerInfoList CollectWorkerInfo();
+
+  void SendTargetList(base::ListValue* list,
+                      const WorkerInfoList& worker_info);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DEBUGGER_DEBUGGER_API_H_