Implement signin using webview

extensions/browser/guest_view/web_view/web_view_guest_delegate.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_DELEGATE_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_DELEGATE_H_
 
 #include "extensions/browser/guest_view/guest_view_base.h"
 
 namespace content {
@@ skipping 38 matching lines @@
 
   // Called just after additional initialization is performed.
   virtual void OnDidInitialize() = 0;
 
   virtual void OnDocumentLoadedInFrame(
       content::RenderFrameHost* render_frame_host) = 0;
 
   // Called immediately after the guest WebContents is ready.
   virtual void OnGuestReady() = 0;
 
+  // Called before the guest will be detached from its embedder.
+  virtual void OnWillDetachFromEmbedder() = 0;
+
   // Called immediately after the guest WebContents has been destroyed.
   virtual void OnGuestDestroyed() = 0;
 
   // Called when to set the zoom factor.
   virtual void OnSetZoom(double zoom_factor) = 0;
 
   // Shows the context menu for the guest.
   // |items| acts as a filter. This restricts the current context's default
   // menu items to contain only the items from |items|.
   // |items| == NULL means no filtering will be applied.
   virtual void OnShowContextMenu(
       int request_id,
       const MenuItemVector* items) = 0;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_DELEGATE_H_