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

content/public/browser/content_browser_client.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 CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "content/public/common/window_container_type.h"
 #include "content/public/common/content_client.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebNotificationPresenter.h"
 
-class AccessTokenStore;
 class BrowserURLHandler;
 class CommandLine;
 class FilePath;
 class GURL;
 class MHTMLGenerationManager;
 class PluginProcessHost;
 class QuotaPermissionContext;
 class RenderViewHost;
 class RenderWidgetHost;
 class RenderWidgetHostView;
 class ResourceDispatcherHost;
 class SiteInstance;
 class SSLCertErrorHandler;
 class SSLClientAuthHandler;
 class SkBitmap;
 class TabContents;
 class TabContentsView;
 class WorkerProcessHost;
 struct WebPreferences;
 
 namespace content {
+class AccessTokenStore;
 class BrowserMainParts;
 struct MainFunctionParams;
 struct ShowDesktopNotificationHostMsgParams;
 class RenderProcessHost;
 }
 
 namespace crypto {
 class CryptoModuleBlockingPasswordDelegate;
 }
 
@@ skipping 315 matching lines @@
   // This is called on a worker thread.
   virtual
       crypto::CryptoModuleBlockingPasswordDelegate* GetCryptoPasswordDelegate(
           const GURL& url) = 0;
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_