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..eff6606a184893ccdaa6505cf62048a1a690542e 100644
--- a/ui/aura/mus/window_port_mus.h
+++ b/ui/aura/mus/window_port_mus.h
@@ -133,7 +133,7 @@ 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.
+    // Applies to BOUNDS. This should be in pixels.

[sky, 2016/12/15 22:07:32]

Name the member as such to reinforce that, e.g. bounds_in_pixels.

[riajiang, 2016/12/19 23:51:55]

In order to move conversions to WTC, this now takes in bounds_in_dip.

     gfx::Rect bounds;
     // Applies to VISIBLE.
     bool visible;