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

cc/test/fake_scrollbar_layer.cc

Index: cc/test/fake_scrollbar_layer.cc
diff --git a/cc/test/fake_scrollbar_layer.cc b/cc/test/fake_scrollbar_layer.cc
index 96fbeecc3ae79d0ba215a13fb2de3601ff45a879..457a5d1a2a87f285f61e04ad5555ce8e435b1ab5 100644
--- a/cc/test/fake_scrollbar_layer.cc
+++ b/cc/test/fake_scrollbar_layer.cc
@@ -31,11 +31,10 @@ FakeScrollbarLayer::FakeScrollbarLayer(bool paint_during_update,
 FakeScrollbarLayer::~FakeScrollbarLayer() {}
 
 void FakeScrollbarLayer::Update(ResourceUpdateQueue* queue,
-                                const OcclusionTracker* occlusion,
-                                RenderingStats* stats) {
+                                const OcclusionTracker* occlusion) {
   size_t full = queue->FullUploadSize();
   size_t partial = queue->PartialUploadSize();
-  ScrollbarLayer::Update(queue, occlusion, stats);
+  ScrollbarLayer::Update(queue, occlusion);
   update_count_++;
   last_update_full_upload_size_ = queue->FullUploadSize() - full;
   last_update_partial_upload_size_ = queue->PartialUploadSize() - partial;