cc: Plumbing for impl thread micro benchmarks

cc/debug/micro_benchmark.cc

Index: cc/debug/micro_benchmark.cc
diff --git a/cc/debug/micro_benchmark.cc b/cc/debug/micro_benchmark.cc
index 1742e7f3d6258f98321cad7034145117f078ab74..0b9d2eae7268189b91a2e790536798af23df31c6 100644
--- a/cc/debug/micro_benchmark.cc
+++ b/cc/debug/micro_benchmark.cc
@@ -7,6 +7,7 @@
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
+#include "cc/debug/micro_benchmark_impl.h"
 
 namespace cc {
 
@@ -30,4 +31,9 @@ void MicroBenchmark::RunOnLayer(Layer* layer) {}
 
 void MicroBenchmark::RunOnLayer(PictureLayer* layer) {}
 
+scoped_ptr<MicroBenchmarkImpl> MicroBenchmark::CreateBenchmarkImpl(
+    scoped_refptr<base::MessageLoopProxy> origin_loop) {
+  return make_scoped_ptr<MicroBenchmarkImpl>(NULL);
+}
+
 }  // namespace cc