Refactor OAuth2TokenService to have profile- and device-based implementations.

chrome/browser/signin/oauth2_token_service_request.h

-// Copyright 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 CHROME_BROWSER_SIGNIN_OAUTH2_TOKEN_SERVICE_REQUEST_H_
-#define CHROME_BROWSER_SIGNIN_OAUTH2_TOKEN_SERVICE_REQUEST_H_
-
-#include <set>
-#include <string>
-
-#include "base/memory/ref_counted.h"
-#include "base/threading/non_thread_safe.h"
-#include "base/time.h"
-#include "chrome/browser/signin/oauth2_token_service.h"
-#include "google_apis/gaia/google_service_auth_error.h"
-
-class Profile;
-
-// OAuth2TokenServiceRequest represents a request to fetch an OAuth2 access
-// token for a given set of |scopes| by calling |profile|'s
-// OAuth2TokenService. A request can be created and started from any thread
-// with an object |consumer| that will be called back on the same thread when
-// fetching completes.
-// If the request is destructed before |consumer| is called, |consumer| will
-// never be called back. (Note the actual network activities are not canceled
-// and the cache in OAuth2TokenService will be populated with the fetched
-// results.)
-class OAuth2TokenServiceRequest : public OAuth2TokenService::Request,
-                                  public base::NonThreadSafe {
- public:
-  static OAuth2TokenServiceRequest* CreateAndStart(
-      Profile* profile,
-      const OAuth2TokenService::ScopeSet& scopes,
-      OAuth2TokenService::Consumer* consumer);
-
-  virtual ~OAuth2TokenServiceRequest();
-
- private:
-  class Core;
-  friend class Core;
-
-  OAuth2TokenServiceRequest(Profile* profile,
-                            const OAuth2TokenService::ScopeSet& scopes,
-                            OAuth2TokenService::Consumer* consumer);
-  OAuth2TokenService::Consumer* const consumer_;
-  scoped_refptr<Core> core_;
-
-  DISALLOW_COPY_AND_ASSIGN(OAuth2TokenServiceRequest);
-};
-
-#endif  // CHROME_BROWSER_SIGNIN_OAUTH2_TOKEN_SERVICE_REQUEST_H_