Remove LayerTreeHostImpl::DrawViewportSize().

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 8080c57afb3446bd07f2ac00ff77b4758ea965c5..1fe5871b8a0bc4da2f26728082415c94c7f2dd51 100644
--- a/cc/trees/layer_tree_impl.cc
+++ b/cc/trees/layer_tree_impl.cc
@@ -1029,7 +1029,7 @@ bool LayerTreeImpl::UpdateDrawProperties(bool update_lcd_text) {
     // calculations except when this function is explicitly passed a flag asking
     // us to skip it.
     LayerTreeHostCommon::CalcDrawPropsImplInputs inputs(
-        layer_list_[0], DrawViewportSize(),
+        layer_list_[0], DeviceViewport().size(),
         layer_tree_host_impl_->DrawTransform(), device_scale_factor(),
         current_page_scale_factor(), PageScaleLayer(),
         InnerViewportScrollLayer(), OuterViewportScrollLayer(),
@@ -1169,8 +1169,8 @@ void LayerTreeImpl::BuildPropertyTreesForTesting() {
       OuterViewportScrollLayer(), OverscrollElasticityLayer(),
       elastic_overscroll()->Current(IsActiveTree()),
       current_page_scale_factor(), device_scale_factor(),
-      gfx::Rect(DrawViewportSize()), layer_tree_host_impl_->DrawTransform(),
-      &property_trees_);
+      gfx::Rect(DeviceViewport().size()),
+      layer_tree_host_impl_->DrawTransform(), &property_trees_);
   property_trees_.transform_tree.set_source_to_parent_updates_allowed(false);
 }
 
@@ -1392,10 +1392,6 @@ gfx::Rect LayerTreeImpl::DeviceViewport() const {
   return layer_tree_host_impl_->DeviceViewport();
 }
 
-gfx::Size LayerTreeImpl::DrawViewportSize() const {
-  return layer_tree_host_impl_->DrawViewportSize();
-}
-
 const gfx::Rect LayerTreeImpl::ViewportRectForTilePriority() const {
   return layer_tree_host_impl_->ViewportRectForTilePriority();
 }