Revert of Remove dependency on content from remoting_host.

remoting/host/chromoting_host_context.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 REMOTING_HOST_CHROMOTING_HOST_CONTEXT_H_
 #define REMOTING_HOST_CHROMOTING_HOST_CONTEXT_H_
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 
-namespace base {
-class SingleThreadTaskRunner;
-}  // namespace base
-
 namespace net {
 class URLRequestContextGetter;
 }  // namespace net
 
 namespace remoting {
 
 class AutoThreadTaskRunner;
 
 // A class that manages threads and running context for the chromoting host
 // process.  This class is virtual only for testing purposes (see below).
@@ skipping 10 matching lines @@
   // Attaches task runners to the relevant browser threads for the chromoting
   // host.  Must be called on the UI thread of the browser process.
   // remoting::UrlRequestContextGetter returns BasicURLRequestContext under
   // the hood which spawns two new threads per instance.  Since
   // ChromotingHostContext can be destroyed from any thread, as its owner
   // (It2MeHost) is ref-counted, joining the created threads during shutdown
   // violates the "Disallow IO" thread restrictions on some task runners (e.g.
   // the IO Thread of the browser process).
   // Instead, we re-use the |url_request_context_getter| in the browser process.
   static scoped_ptr<ChromotingHostContext> CreateForChromeOS(
-      scoped_refptr<net::URLRequestContextGetter> url_request_context_getter,
-      scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
-      scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
-      scoped_refptr<base::SingleThreadTaskRunner> file_task_runner);
+      scoped_refptr<net::URLRequestContextGetter> url_request_context_getter);
 #endif  // defined(OS_CHROMEOS)
 
   ~ChromotingHostContext();
 
   scoped_ptr<ChromotingHostContext> Copy();
 
   // Task runner for the thread that is used for the UI.
   scoped_refptr<AutoThreadTaskRunner> ui_task_runner() const;
 
   // Task runner for the thread used for audio capture and encoding.
@@ skipping 59 matching lines @@
 
   // Serves URLRequestContexts that use the network and UI task runners.
   scoped_refptr<net::URLRequestContextGetter> url_request_context_getter_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromotingHostContext);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_CHROMOTING_HOST_CONTEXT_H_