Implement autosizing for <extensionoptions>

chrome/browser/guest_view/extension_options/extension_options_guest.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 CHROME_BROWSER_GUEST_VIEW_EXTENSION_OPTIONS_EXTENSION_OPTIONS_GUEST_H_
 #define CHROME_BROWSER_GUEST_VIEW_EXTENSION_OPTIONS_EXTENSION_OPTIONS_GUEST_H_
 
 #include "base/macros.h"
 #include "chrome/browser/guest_view/guest_view.h"
 #include "extensions/browser/extension_function_dispatcher.h"
@@ skipping 15 matching lines @@
   virtual bool CanEmbedderUseGuestView(
       const std::string& embedder_extension_id) OVERRIDE;
   virtual void CreateWebContents(
       const std::string& embedder_extension_id,
       int embedder_render_process_id,
       const base::DictionaryValue& create_params,
       const WebContentsCreatedCallback& callback) OVERRIDE;
   virtual void DidAttachToEmbedder() OVERRIDE;
   virtual void DidInitialize() OVERRIDE;
   virtual void DidStopLoading() OVERRIDE;
+  virtual void GuestSizeChangedDueToAutoSize(
+      const gfx::Size& old_size,
+      const gfx::Size& new_size) OVERRIDE;
+  virtual bool IsAutoSizeSupported() const OVERRIDE;
 
   // ExtensionFunctionDispatcher::Delegate implementation.
   virtual content::WebContents* GetAssociatedWebContents() const OVERRIDE;
 
   // content::WebContentsObserver implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
  private:
   ExtensionOptionsGuest(content::BrowserContext* browser_context,
                         int guest_instance_id);
   virtual ~ExtensionOptionsGuest();
+  void SetUpAutoSize();
   void OnRequest(const ExtensionHostMsg_Request_Params& params);
 
   scoped_ptr<extensions::ExtensionFunctionDispatcher>
       extension_function_dispatcher_;
   GURL options_page_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionOptionsGuest);
 };
 
 #endif  // CHROME_BROWSER_GUEST_VIEW_EXTENSION_OPTIONS_EXTENSION_OPTIONS_GUEST_H_