cc: Move RequiresHighResToDraw from tree to lthi.

cc/trees/layer_tree_host_impl.h

Index: cc/trees/layer_tree_host_impl.h
diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h
index a987d46ecfcb211688f7b6e27e6aec420639d365..a4ad7e5fbca9500794a0c25ce7f83d52a38356c0 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -481,6 +481,10 @@ class CC_EXPORT LayerTreeHostImpl
 
   void SetTopControlsLayoutHeight(float height);
 
+  void SetRequiresHighResToDraw() { requires_high_res_to_draw_ = true; }
+  void ResetRequiresHighResToDraw() { requires_high_res_to_draw_ = false; }
+  bool RequiresHighResToDraw() const { return requires_high_res_to_draw_; }
+
  protected:
   LayerTreeHostImpl(
       const LayerTreeSettings& settings,
@@ -703,6 +707,8 @@ class CC_EXPORT LayerTreeHostImpl
   std::vector<PictureLayerImpl*> picture_layers_;
   std::vector<PictureLayerImpl::Pair> picture_layer_pairs_;
 
+  bool requires_high_res_to_draw_;
+
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };