Move TestURLRequestContextGetter to url_request_test_util.{h,cc}

chrome/test/base/test_url_request_context_getter.h

-// 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.
-
-#ifndef CHROME_TEST_BASE_TEST_URL_REQUEST_CONTEXT_GETTER_H_
-#define CHROME_TEST_BASE_TEST_URL_REQUEST_CONTEXT_GETTER_H_
-#pragma once
-
-#include "base/memory/ref_counted.h"
-#include "net/url_request/url_request_context_getter.h"
-
-namespace base {
-class MessageLoopProxy;
-}
-
-// Used to return a dummy context (normally the context is on the IO thread).
-// The one here can be run on the main test thread. Note that this can lead to
-// a leak if your test does not have a BrowserThread::IO in it because
-// URLRequestContextGetter is defined as a ReferenceCounted object with a
-// special trait that deletes it on the IO thread.
-class TestURLRequestContextGetter : public net::URLRequestContextGetter {
- public:
-  TestURLRequestContextGetter();
-  virtual ~TestURLRequestContextGetter();
-
-  // net::URLRequestContextGetter implementation.
-  virtual net::URLRequestContext* GetURLRequestContext() OVERRIDE;
-  virtual scoped_refptr<base::MessageLoopProxy>
-      GetIOMessageLoopProxy() const OVERRIDE;
-
- private:
-  scoped_refptr<net::URLRequestContext> context_;
-};
-
-#endif  // CHROME_TEST_BASE_TEST_URL_REQUEST_CONTEXT_GETTER_H_