Delete a bunch of noop paint invalidation code.

sky/engine/public/web/WebWidgetClient.h

Index: sky/engine/public/web/WebWidgetClient.h
diff --git a/sky/engine/public/web/WebWidgetClient.h b/sky/engine/public/web/WebWidgetClient.h
index 982eef7fcf5e5f321c7a89f9c25e0e432874ff7c..3d9fa023900f7a2781bc65807a1b54a1d03e5e7e 100644
--- a/sky/engine/public/web/WebWidgetClient.h
+++ b/sky/engine/public/web/WebWidgetClient.h
@@ -48,21 +48,12 @@ struct WebSize;
 
 class WebWidgetClient {
 public:
-    // Called when a region of the WebWidget needs to be re-painted.
-    virtual void didInvalidateRect(const WebRect&) { }
-
     // Called when the Widget has changed size as a result of an auto-resize.
     virtual void didAutoResize(const WebSize& newSize) { }
 
     // Initialize compositing for this widget.
     virtual void initializeLayerTreeView() { BLINK_ASSERT_NOT_REACHED(); };
 
-    // Sometimes the WebWidget enters a state where it will generate a sequence
-    // of invalidations that should not, by themselves, trigger the compositor
-    // to schedule a new frame. This call indicates to the embedder that it
-    // should suppress compositor scheduling temporarily.
-    virtual void suppressCompositorScheduling(bool enable) { }
-
     // Indicates to the embedder that the compositor is about to begin a
     // frame. This is primarily to signal to flow control mechanisms that a
     // frame is beginning, not to perform actual painting work.