cc: Remove fixed raster scale, stop rasterizing with will-change.

ui/compositor/compositor.h

Index: ui/compositor/compositor.h
diff --git a/ui/compositor/compositor.h b/ui/compositor/compositor.h
index a6245dae5afdc34756adb3b416c6415d3503bd12..02a915dfa5a2657034d1f2b7b629a9d98200e8d5 100644
--- a/ui/compositor/compositor.h
+++ b/ui/compositor/compositor.h
@@ -307,9 +307,6 @@ class COMPOSITOR_EXPORT Compositor
   void DidCommitAndDrawFrame() override;
   void DidCompleteSwapBuffers() override;
   void DidCompletePageScaleAnimation() override {}
-  void ReportFixedRasterScaleUseCounters(
-      bool has_blurry_content,
-      bool has_potential_performance_regression) override {}
 
   // cc::LayerTreeHostSingleThreadClient implementation.
   void DidPostSwapBuffers() override;