Separate RenderView from RenderWidget, part 4: Painting calls in the delegate.

content/renderer/render_widget_owner_delegate.h

Index: content/renderer/render_widget_owner_delegate.h
diff --git a/content/renderer/render_widget_owner_delegate.h b/content/renderer/render_widget_owner_delegate.h
index 309324ae13dbbd33da460a69ee8a630bb78e4d18..4c76ddd19bd31f2326a025c41ad99749442505ed 100644
--- a/content/renderer/render_widget_owner_delegate.h
+++ b/content/renderer/render_widget_owner_delegate.h
@@ -40,6 +40,15 @@ class CONTENT_EXPORT RenderWidgetOwnerDelegate {
   virtual bool RenderWidgetWillHandleMouseEvent(
       const blink::WebMouseEvent& event) = 0;
 
+  // Painting notifications. RenderWidgetDidCommitAndDrawCompositorFrame happens
+  // when that has completed, and subsequent rendering won't affect the painted
+  // content. DidFlushPaint happens once we've received the ACK that the screen
+  // has been updated. For a given paint operation, these overrides will always
+  // be called in the order RenderWidgetDidCommitAndDrawCompositorFrame,
+  // RenderWidgetDidFlushPaint.
+  virtual void RenderWidgetDidCommitAndDrawCompositorFrame() = 0;
+  virtual void RenderWidgetDidFlushPaint() = 0;
+
  protected:
   virtual ~RenderWidgetOwnerDelegate() {}
 };