Set scale/orientation property to aura root window

ui/aura/root_window.cc

Index: ui/aura/root_window.cc
diff --git a/ui/aura/root_window.cc b/ui/aura/root_window.cc
index 1a1995f5726cba704fbdbea7960a2a2fd4bcc71e..56e3e851fa2d2ed214261a4ef009b3518f96cfff 100644
--- a/ui/aura/root_window.cc
+++ b/ui/aura/root_window.cc
@@ -213,6 +213,10 @@ void RootWindow::SetCursor(gfx::NativeCursor cursor) {
   host_->SetCursor(cursor);
 }
 
+void RootWindow::SetHostWindowProperty(const std::string& name, int value) {
+  host_->SetHostWindowProperty(name, value);
+}
+
 void RootWindow::OnCursorVisibilityChanged(bool show) {
   host_->OnCursorVisibilityChanged(show);
 }