Scale bounds in aura-mus client-lib and NativeWidgetMus in hdpi mode.

ui/aura/mus/window_port_mus.h

Index: ui/aura/mus/window_port_mus.h
diff --git a/ui/aura/mus/window_port_mus.h b/ui/aura/mus/window_port_mus.h
index e88b694694432e2114c78b695f36cd1a849eb9a0..89bfad4cd8f9bd49d26eeb0fbe109458d33acbf4 100644
--- a/ui/aura/mus/window_port_mus.h
+++ b/ui/aura/mus/window_port_mus.h
@@ -133,8 +133,8 @@ class AURA_EXPORT WindowPortMus : public WindowPort, public WindowMus {
     // Applies to ADD, ADD_TRANSIENT, REMOVE, REMOVE_TRANSIENT, REORDER and
     // TRANSIENT_REORDER.
     Id child_id;
-    // Applies to BOUNDS.
-    gfx::Rect bounds;
+    // Applies to BOUNDS. This should be in dip.
+    gfx::Rect bounds_in_dip;
     // Applies to VISIBLE.
     bool visible;
     // Applies to PROPERTY.