Separate RenderView from RenderWidget, part 1: inheritance.

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..362d6d6da055b97f77ff579b3c768584c081b4ba 100644
--- a/content/public/renderer/render_view.h
+++ b/content/public/renderer/render_view.h
@@ -38,6 +38,7 @@ class Size;
 namespace content {
 
 class RenderFrame;
+class RenderWidget;
 class RenderViewVisitor;
 struct SSLStatus;
 struct WebPreferences;
@@ -66,6 +67,9 @@ class CONTENT_EXPORT RenderView : public IPC::Sender {
   static void ApplyWebPreferences(const WebPreferences& preferences,
                                   blink::WebView* web_view);
 
+  // Returns the RenderWidget for this RenderView.
+  virtual RenderWidget* GetWidget() const = 0;
+
   // Returns the main RenderFrame.
   virtual RenderFrame* GetMainRenderFrame() = 0;