Update from https://crrev.com/304418

cc/trees/layer_tree_host_pixeltest_blending.cc

Index: cc/trees/layer_tree_host_pixeltest_blending.cc
diff --git a/cc/trees/layer_tree_host_pixeltest_blending.cc b/cc/trees/layer_tree_host_pixeltest_blending.cc
index 148769e56f8caaa0495383870d0d743b07361230..14029b5ab83661c67db8aa5016497b7ea4ab3f23 100644
--- a/cc/trees/layer_tree_host_pixeltest_blending.cc
+++ b/cc/trees/layer_tree_host_pixeltest_blending.cc
@@ -61,7 +61,7 @@ class LayerTreeHostBlendingPixelTest : public LayerTreePixelTest {
     pixel_comparator_.reset(new FuzzyPixelOffByOneComparator(true));
   }
 
-  virtual void InitializeSettings(LayerTreeSettings* settings) override {
+  void InitializeSettings(LayerTreeSettings* settings) override {
     settings->force_antialiasing = force_antialiasing_;
     settings->force_blending_with_shaders = force_blending_with_shaders_;
   }