Update WebLayerTreeViewClient overrides for WebKit API change

ui/gfx/compositor/compositor_cc.cc

Index: ui/gfx/compositor/compositor_cc.cc
diff --git a/ui/gfx/compositor/compositor_cc.cc b/ui/gfx/compositor/compositor_cc.cc
index 98ab62afb079a38293144d600538e070301e9517..fffb6ded5da8a5f8b36a06c1c031453458e0b939 100644
--- a/ui/gfx/compositor/compositor_cc.cc
+++ b/ui/gfx/compositor/compositor_cc.cc
@@ -237,6 +237,12 @@ bool CompositorCC::ReadPixels(SkBitmap* bitmap, const gfx::Rect& bounds) {
 void CompositorCC::animateAndLayout(double frameBeginTime) {
 }
 
+void CompositorCC::updateAnimations(double frameBeginTime) {
+}
+
+void CompositorCC::layout() {
+}
+
 void CompositorCC::applyScrollAndScale(const WebKit::WebSize& scrollDelta,
                                        float scaleFactor) {
 }