cc: Move RequiresHighResToDraw from tree to lthi.

cc/trees/layer_tree_impl.cc

Index: cc/trees/layer_tree_impl.cc
diff --git a/cc/trees/layer_tree_impl.cc b/cc/trees/layer_tree_impl.cc
index f5dda6e584e026f94f28c67fd98a67c53d866a5e..f9c3c4d43b21efc1093003e3a508e1eef09d88b3 100644
--- a/cc/trees/layer_tree_impl.cc
+++ b/cc/trees/layer_tree_impl.cc
@@ -88,7 +88,6 @@ LayerTreeImpl::LayerTreeImpl(LayerTreeHostImpl* layer_tree_host_impl)
       max_page_scale_factor_(0),
       scrolling_layer_id_from_previous_tree_(0),
       contents_textures_purged_(false),
-      requires_high_res_to_draw_(false),
       viewport_size_invalid_(false),
       needs_update_draw_properties_(true),
       needs_full_tree_sync_(true),
@@ -628,7 +627,7 @@ void LayerTreeImpl::DidBecomeActive() {
 
   // Always reset this flag on activation, as we would only have activated
   // if we were in a good state.
-  ResetRequiresHighResToDraw();
+  layer_tree_host_impl_->ResetRequiresHighResToDraw();
 
   if (root_layer())
     DidBecomeActiveRecursive(root_layer());
@@ -655,16 +654,8 @@ void LayerTreeImpl::ResetContentsTexturesPurged() {
   layer_tree_host_impl_->OnCanDrawStateChangedForTree();
 }
 
-void LayerTreeImpl::SetRequiresHighResToDraw() {
-  requires_high_res_to_draw_ = true;
-}
-
-void LayerTreeImpl::ResetRequiresHighResToDraw() {
-  requires_high_res_to_draw_ = false;
-}
-
 bool LayerTreeImpl::RequiresHighResToDraw() const {
-  return requires_high_res_to_draw_;
+  return layer_tree_host_impl_->RequiresHighResToDraw();
 }
 
 bool LayerTreeImpl::ViewportSizeInvalid() const {