Sets a transparent background for out-of-process subframes.

content/public/renderer/render_view.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_PUBLIC_RENDERER_RENDER_VIEW_H_
 #define CONTENT_PUBLIC_RENDERER_RENDER_VIEW_H_
 
 #include <stddef.h>
 
 #include <string>
 
 #include "base/strings/string16.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "content/public/common/top_controls_state.h"
 #include "ipc/ipc_sender.h"
 #include "third_party/WebKit/public/platform/WebPageVisibilityState.h"
 #include "ui/gfx/geometry/rect_f.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace blink {
 class WebElement;
 class WebFrame;
+class WebFrameWidget;
 class WebLocalFrame;
 class WebNode;
 class WebString;
 class WebURLRequest;
 class WebView;
 struct WebContextMenuData;
 struct WebRect;
 }
 
 namespace gfx {
@@ skipping 47 matching lines @@
   // Gets WebKit related preferences associated with this view.
   virtual WebPreferences& GetWebkitPreferences() = 0;
 
   // Overrides the WebKit related preferences associated with this view. Note
   // that the browser process may update the preferences at any time.
   virtual void SetWebkitPreferences(const WebPreferences& preferences) = 0;
 
   // Returns the associated WebView. May return NULL when the view is closing.
   virtual blink::WebView* GetWebView() = 0;
 
+  // Returns the associated WebFrameWidget.
+  virtual blink::WebFrameWidget* GetWebFrameWidget() = 0;
+
   // Returns true if we should display scrollbars for the given view size and
   // false if the scrollbars should be hidden.
   virtual bool ShouldDisplayScrollbars(int width, int height) const = 0;
 
   // Bitwise-ORed set of extra bindings that have been enabled.  See
   // BindingsPolicy for details.
   virtual int GetEnabledBindings() const = 0;
 
   // Whether content state (such as form state, scroll position and page
   // contents) should be sent to the browser immediately. This is normally
@@ skipping 47 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class RenderViewImpl;
   RenderView() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_RENDER_VIEW_H_