cc: Switch RenderingStats collection in Layer::Update() to RenderingStatsInstrumentation

cc/test/fake_content_layer.cc

Index: cc/test/fake_content_layer.cc
diff --git a/cc/test/fake_content_layer.cc b/cc/test/fake_content_layer.cc
index 384521c9b81afb0dc9c9be5b1ba7c7d84dbd819b..a30ea952ade5df8a2fe4f13f7408edd79212d3a8 100644
--- a/cc/test/fake_content_layer.cc
+++ b/cc/test/fake_content_layer.cc
@@ -25,9 +25,8 @@ scoped_ptr<LayerImpl> FakeContentLayer::CreateLayerImpl(
 }
 
 void FakeContentLayer::Update(ResourceUpdateQueue* queue,
-                              const OcclusionTracker* occlusion,
-                              RenderingStats* stats) {
-  ContentLayer::Update(queue, occlusion, stats);
+                              const OcclusionTracker* occlusion) {
+  ContentLayer::Update(queue, occlusion);
   update_count_++;
 }