cc: Plumbing for impl thread micro benchmarks

cc/layers/picture_layer_impl.cc

Index: cc/layers/picture_layer_impl.cc
diff --git a/cc/layers/picture_layer_impl.cc b/cc/layers/picture_layer_impl.cc
index 23e35b26ae6de81ac8a4fd641f3311de498e855f..cb9f40968765716a491ab1b2e91192961cc68238 100644
--- a/cc/layers/picture_layer_impl.cc
+++ b/cc/layers/picture_layer_impl.cc
@@ -10,6 +10,7 @@
 #include "cc/base/math_util.h"
 #include "cc/base/util.h"
 #include "cc/debug/debug_colors.h"
+#include "cc/debug/micro_benchmark_impl.h"
 #include "cc/debug/traced_value.h"
 #include "cc/layers/append_quads_data.h"
 #include "cc/layers/quad_sink.h"
@@ -1091,4 +1092,8 @@ size_t PictureLayerImpl::GPUMemoryUsageInBytes() const {
   return tilings_->GPUMemoryUsageInBytes();
 }
 
+void PictureLayerImpl::RunMicroBenchmark(MicroBenchmarkImpl* benchmark) {
+  benchmark->RunOnLayer(this);
+}
+
 }  // namespace cc