Switch the inheritance of WebView from WebWidget to protected.

content/renderer/render_view_impl.h

 // Copyright (c) 2012 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_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 884 matching lines @@
   bool top_controls_shrink_blink_size_;
 
   // The height of the top controls.
   float top_controls_height_;
 
   // Indicates whether this page has been focused/unfocused by the browser.
   bool has_focus_;
 
   // View ----------------------------------------------------------------------
 
+  blink::WebView* webview_;
+
   // Cache the preferred size of the page in order to prevent sending the IPC
   // when layout() recomputes but doesn't actually change sizes.
   gfx::Size preferred_size_;
 
   // Used to delay determining the preferred size (to avoid intermediate
   // states for the sizes).
   base::OneShotTimer check_preferred_size_timer_;
 
   // Bookkeeping to suppress redundant scroll and focus requests for an already
   // scrolled and focused editable node.
@@ skipping 108 matching lines @@
   // use the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_