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 065a66a07f25594f5d2b6378106c85b0e225c391..5e752c60540264bed19df449ffe6e064349d6f58 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"
@@ -1095,4 +1096,8 @@ size_t PictureLayerImpl::GPUMemoryUsageInBytes() const {
   return tilings_->GPUMemoryUsageInBytes();
 }
 
+void PictureLayerImpl::RunMicroBenchmark(MicroBenchmarkImpl* benchmark) {
+  benchmark->RunOnLayer(this);
+}
+
 }  // namespace cc