cc: Add message passing mechanism to micro benchmarking.

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 464d0cb625dd0ba40ff0774948e98f826613ae5e..05c5c0d1a562217dc2b8bd636738deeae309ecd4 100644
--- a/cc/debug/micro_benchmark.cc
+++ b/cc/debug/micro_benchmark.cc
@@ -16,7 +16,9 @@ namespace cc {
 MicroBenchmark::MicroBenchmark(const DoneCallback& callback)
     : callback_(callback),
       is_done_(false),
-      processed_for_benchmark_impl_(false) {}
+      processed_for_benchmark_impl_(false),
+      id_(0) {
+}
 
 MicroBenchmark::~MicroBenchmark() {}
 
@@ -35,6 +37,10 @@ void MicroBenchmark::RunOnLayer(Layer* layer) {}
 
 void MicroBenchmark::RunOnLayer(PictureLayer* layer) {}
 
+bool MicroBenchmark::ProcessMessage(scoped_ptr<base::Value> value) {
+  return false;
+}
+
 bool MicroBenchmark::ProcessedForBenchmarkImpl() const {
   return processed_for_benchmark_impl_;
 }