Move AccessTokenStore to Content API, now that it is a pure-virtual class.

content/browser/geolocation/access_token_store.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.
-
-// Defines the Geolocation access token store, and associated factory function.
-// An access token store is responsible for providing the API to persist
-// access tokens, one at a time, and to load them back on mass.
-// The API is a little more complex than one might wish, due to the need for
-// prefs access to happen asynchronously on the UI thread.
-// This API is provided as abstract base classes to allow mocking and testing
-// of clients, without dependency on browser process singleton objects etc.
-
-#ifndef CONTENT_BROWSER_GEOLOCATION_ACCESS_TOKEN_STORE_H_
-#define CONTENT_BROWSER_GEOLOCATION_ACCESS_TOKEN_STORE_H_
-#pragma once
-
-#include <map>
-
-#include "base/callback.h"
-#include "base/memory/ref_counted.h"
-#include "base/string16.h"
-#include "content/common/content_export.h"
-#include "googleurl/src/gurl.h"
-
-class GURL;
-
-namespace net {
-class URLRequestContextGetter;
-}
-
-// Provides storage for the access token used in the network request.
-class AccessTokenStore : public base::RefCountedThreadSafe<AccessTokenStore> {
- public:
-  // Map of server URLs to associated access token.
-  typedef std::map<GURL, string16> AccessTokenSet;
-  typedef base::Callback<void(AccessTokenSet, net::URLRequestContextGetter*)>
-      LoadAccessTokensCallbackType;
-
-  // |callback| will be invoked once per LoadAccessTokens call, after existing
-  // access tokens have been loaded from persistent store. As a convenience the
-  // URLRequestContextGetter is also supplied as an argument in |callback|, as
-  // in Chrome the call to obtain this must also be performed on the UI thread
-  // so it is efficient to piggyback it onto this request.
-  // Takes ownership of |callback|.
-  CONTENT_EXPORT virtual void LoadAccessTokens(
-      const LoadAccessTokensCallbackType& callback) = 0;
-
-  virtual void SaveAccessToken(
-      const GURL& server_url, const string16& access_token) = 0;
-
- protected:
-  friend class base::RefCountedThreadSafe<AccessTokenStore>;
-  CONTENT_EXPORT AccessTokenStore();
-  CONTENT_EXPORT virtual ~AccessTokenStore();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(AccessTokenStore);
-};
-
-#endif  // CONTENT_BROWSER_GEOLOCATION_ACCESS_TOKEN_STORE_H_