<webview>: Implement fullscreen permission for html5 element.requestFullscreen()

extensions/browser/guest_view/guest_view_base.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_GUEST_VIEW_BASE_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_
 
 #include <queue>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 106 matching lines @@
   // This gives the derived class an opportunity to perform some cleanup.
   virtual void GuestDestroyed() {}
 
   // This method is invoked when the guest RenderView is ready, e.g. because we
   // recreated it after a crash or after reattachment.
   //
   // This gives the derived class an opportunity to perform some initialization
   // work.
   virtual void GuestReady() {}
 
+  virtual void EmbedderFullscreenToggled(bool entered_fullscreen) {}
+
   // This method is invoked when the contents auto-resized to give the container
   // an opportunity to match it if it wishes.
   //
   // This gives the derived class an opportunity to inform its container element
   // or perform other actions.
   virtual void GuestSizeChangedDueToAutoSize(const gfx::Size& old_size,
                                              const gfx::Size& new_size) {}
 
   // This method queries whether autosize is supported for this particular view.
   // By default, autosize is not supported. Derived classes can override this
@@ skipping 300 matching lines @@
   // This is used to ensure pending tasks will not fire after this object is
   // destroyed.
   base::WeakPtrFactory<GuestViewBase> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GuestViewBase);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_