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

content/public/renderer/render_view.h

Index: content/public/renderer/render_view.h
diff --git a/content/public/renderer/render_view.h b/content/public/renderer/render_view.h
index d02fa8f537dce23fb787f3add73f7c7630196a34..f913f64e59dc00f3e5d66e1df563beffab7c7d70 100644
--- a/content/public/renderer/render_view.h
+++ b/content/public/renderer/render_view.h
@@ -21,6 +21,7 @@
 namespace blink {
 class WebElement;
 class WebFrame;
+class WebFrameWidget;
 class WebLocalFrame;
 class WebNode;
 class WebString;
@@ -88,6 +89,9 @@ class CONTENT_EXPORT RenderView : public IPC::Sender {
   // 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;