cc: Remove code for drawing checkerboard quads, it's not used.

cc/layers/layer_impl.cc

Index: cc/layers/layer_impl.cc
diff --git a/cc/layers/layer_impl.cc b/cc/layers/layer_impl.cc
index 957bd2cee503e3dac5a6c459ae1a3d74c5ffddb9..fe6c31f54f54d0784f60b907cba512860b8369a7 100644
--- a/cc/layers/layer_impl.cc
+++ b/cc/layers/layer_impl.cc
@@ -67,7 +67,6 @@ LayerImpl::LayerImpl(LayerTreeImpl* tree_impl,
       contents_opaque_(false),
       is_root_for_isolated_group_(false),
       use_parent_backface_visibility_(false),
-      draw_checkerboard_for_missing_tiles_(false),
       draws_content_(false),
       hide_layer_and_subtree_(false),
       transform_is_invertible_(true),
@@ -547,8 +546,6 @@ void LayerImpl::PushPropertiesTo(LayerImpl* layer) {
   layer->SetBackgroundColor(background_color_);
   layer->SetBounds(bounds_);
   layer->SetDoubleSided(double_sided_);
-  layer->SetDrawCheckerboardForMissingTiles(
-      draw_checkerboard_for_missing_tiles_);
   layer->SetDrawsContent(DrawsContent());
   layer->SetHideLayerAndSubtree(hide_layer_and_subtree_);
   layer->SetHasRenderSurface(!!render_surface());