Android WebView: clean up the AwContentsClientBridge webcontents userdata.

android_webview/browser/aw_contents_client_bridge_base.h

 // Copyright (c) 2013 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 ANDROID_WEBVIEW_BROWSER_AW_CONTENTS_CLIENT_BRIDGE_BASE_H_
 #define ANDROID_WEBVIEW_BROWSER_AW_CONTENTS_CLIENT_BRIDGE_BASE_H_
 
 #include "base/callback_forward.h"
 #include "base/supports_user_data.h"
 #include "content/public/browser/javascript_dialog_manager.h"
@@ skipping 16 matching lines @@
 // implementor of the base class plumbs the request to the Java side and
 // eventually to the webviewclient. This layering hides the details of
 // native/ from browser/ layer.
 class AwContentsClientBridgeBase {
  public:
   typedef base::Callback<void(net::X509Certificate*)> SelectCertificateCallback;
 
   // Adds the handler to the UserData registry.
   static void Associate(content::WebContents* web_contents,
                         AwContentsClientBridgeBase* handler);
+  static void Disassociate(content::WebContents* web_contents);
   static AwContentsClientBridgeBase* FromWebContents(
       content::WebContents* web_contents);
   static AwContentsClientBridgeBase* FromID(int render_process_id,
                                             int render_frame_id);
 
   virtual ~AwContentsClientBridgeBase();
 
   virtual void AllowCertificateError(int cert_error,
                                      net::X509Certificate* cert,
                                      const GURL& request_url,
@@ skipping 16 matching lines @@
       const base::string16& message_text,
       const content::JavaScriptDialogManager::DialogClosedCallback& callback)
       = 0;
 
   virtual bool ShouldOverrideUrlLoading(const base::string16& url) = 0;
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_AW_CONTENTS_CLIENT_BRIDGE_BASE_H_