Add fixed raster scale use counter histograms.

cc/trees/layer_tree_host_unittest_remote_server.cc

Index: cc/trees/layer_tree_host_unittest_remote_server.cc
diff --git a/cc/trees/layer_tree_host_unittest_remote_server.cc b/cc/trees/layer_tree_host_unittest_remote_server.cc
index 0c633d1d82ffb49c2ae1367a8547d8eac1eae34b..18c9fcc6bbda982e62fa88f76c53db5246d67764 100644
--- a/cc/trees/layer_tree_host_unittest_remote_server.cc
+++ b/cc/trees/layer_tree_host_unittest_remote_server.cc
@@ -56,6 +56,9 @@ class LayerTreeHostTestRemoteServer : public testing::Test,
   void DidCommitAndDrawFrame() override {}
   void DidCompleteSwapBuffers() override {}
   void DidCompletePageScaleAnimation() override {}
+  void ReportFixedRasterScaleUseCounters(
+      bool has_blurry_content,
+      bool has_potential_performance_regression) override {}
 
   // RemoteProtoChannel implementation
   void SetProtoReceiver(RemoteProtoChannel::ProtoReceiver* receiver) override {