Remove suppressInvalidations and suppressCompositorScheduling, they don't do anything.

public/web/WebWidgetClient.h

Index: public/web/WebWidgetClient.h
diff --git a/public/web/WebWidgetClient.h b/public/web/WebWidgetClient.h
index 67bb17d2c3a795c095574308f07c6a17d22cf9df..93ae02ff21e135a8da3b92f008320e1c0322047d 100644
--- a/public/web/WebWidgetClient.h
+++ b/public/web/WebWidgetClient.h
@@ -75,12 +75,6 @@ public:
     // FIXME: Remove all overrides of this and change layerTreeView() above to ASSERT_NOT_REACHED.
     virtual bool allowsBrokenNullLayerTreeView() const { return false; }
 
-    // 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) { }
-
     // Called when a call to WebWidget::animate is required
     virtual void scheduleAnimation() { }