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

ui/aura/mus/window_tree_host_mus.h

Index: ui/aura/mus/window_tree_host_mus.h
diff --git a/ui/aura/mus/window_tree_host_mus.h b/ui/aura/mus/window_tree_host_mus.h
index 0d923b46d86668c8058198d6611c9a7e52faab0e..d40ac4c14826d49a098a737e2c9c5f91cc1d909b 100644
--- a/ui/aura/mus/window_tree_host_mus.h
+++ b/ui/aura/mus/window_tree_host_mus.h
@@ -51,8 +51,8 @@ class AURA_EXPORT WindowTreeHostMus : public aura::WindowTreeHostPlatform {
 
   ~WindowTreeHostMus() override;
 
-  // Sets the bounds in dips.
-  void SetBoundsFromServer(const gfx::Rect& bounds);
+  // Sets the bounds in pixels.
+  void SetBoundsFromServer(const gfx::Rect& bounds_in_pixels);
 
   ui::EventDispatchDetails SendEventToProcessor(ui::Event* event) {
     return aura::WindowTreeHostPlatform::SendEventToProcessor(event);