cc: Plumbing for impl thread micro benchmarks

cc/layers/picture_layer_impl.h

Index: cc/layers/picture_layer_impl.h
diff --git a/cc/layers/picture_layer_impl.h b/cc/layers/picture_layer_impl.h
index fd5c0677a98b14966ff7eb46dfc02318562097be..de322ea6ac67d80830bd2e620f7c5d3798c8105c 100644
--- a/cc/layers/picture_layer_impl.h
+++ b/cc/layers/picture_layer_impl.h
@@ -21,6 +21,7 @@ namespace cc {
 
 struct AppendQuadsData;
 class QuadSink;
+class MicroBenchmarkImpl;
 
 class CC_EXPORT PictureLayerImpl
     : public LayerImpl,
@@ -70,6 +71,8 @@ class CC_EXPORT PictureLayerImpl
 
   virtual size_t GPUMemoryUsageInBytes() const OVERRIDE;
 
+  virtual void RunMicroBenchmark(MicroBenchmarkImpl* benchmark) OVERRIDE;
+
  protected:
   PictureLayerImpl(LayerTreeImpl* tree_impl, int id);
   PictureLayerTiling* AddTiling(float contents_scale);