CC: Fix missing swap-used-incomplete-tile updates

cc/test/layer_tree_test.h

Index: cc/test/layer_tree_test.h
diff --git a/cc/test/layer_tree_test.h b/cc/test/layer_tree_test.h
index c6a3f4dc75e2f9ed35b9b4de3bcbf5a59d6a5074..b7bbdad624e4d0feb5384f4a8851f14e053d385a 100644
--- a/cc/test/layer_tree_test.h
+++ b/cc/test/layer_tree_test.h
@@ -45,6 +45,7 @@ class TestHooks : public AnimationDelegate {
   virtual void DrawLayersOnThread(LayerTreeHostImpl* host_impl) {}
   virtual void SwapBuffersOnThread(LayerTreeHostImpl* host_impl, bool result) {}
   virtual void SwapBuffersCompleteOnThread(LayerTreeHostImpl* host_impl) {}
+  virtual void UpdateVisibleTilesOnThread(LayerTreeHostImpl* host_impl) {}
   virtual void AnimateLayers(LayerTreeHostImpl* host_impl,
                              base::TimeTicks monotonic_time) {}
   virtual void UpdateAnimationState(LayerTreeHostImpl* host_impl,
@@ -163,8 +164,9 @@ class LayerTreeTest : public testing::Test, public TestHooks {
   virtual scoped_refptr<cc::ContextProvider>
       OffscreenContextProviderForCompositorThread() OVERRIDE;
 
- private:
   LayerTreeSettings settings_;
+
+ private:
   scoped_ptr<LayerTreeHostClientForTesting> client_;
   scoped_ptr<LayerTreeHost> layer_tree_host_;
   FakeOutputSurface* output_surface_;