Add fixed raster scale use counter histograms.

cc/trees/layer_tree_host.cc

Index: cc/trees/layer_tree_host.cc
diff --git a/cc/trees/layer_tree_host.cc b/cc/trees/layer_tree_host.cc
index a06ea9e9d9d55bbe8892d2f3739006b550c6e510..0642a4617b4bea72d8d4977c7178bf7b09650819 100644
--- a/cc/trees/layer_tree_host.cc
+++ b/cc/trees/layer_tree_host.cc
@@ -958,6 +958,14 @@ void LayerTreeHost::BuildPropertyTreesForTesting() {
       gfx::Rect(device_viewport_size_), identity_transform, &property_trees_);
 }
 
+void LayerTreeHost::ReportFixedRasterScaleUseCounters(
+    bool has_fixed_raster_scale_blurry_content,
+    bool has_fixed_raster_scale_potential_performance_regression) {
+  client_->ReportFixedRasterScaleUseCounters(
+      has_fixed_raster_scale_blurry_content,
+      has_fixed_raster_scale_potential_performance_regression);
+}
+
 bool LayerTreeHost::UsingSharedMemoryResources() {
   return GetRendererCapabilities().using_shared_memory_resources;
 }