Scale bounds in DesktopWindowTreeHostMus and in calls to SetBounds.

ash/host/ash_window_tree_host_unified.cc

Index: ash/host/ash_window_tree_host_unified.cc
diff --git a/ash/host/ash_window_tree_host_unified.cc b/ash/host/ash_window_tree_host_unified.cc
index 550a13d6098a5b9f8e18eeb0550408d8db1f5e2d..a103ac8dc0a1a70cf77dfe74bbbeac883f307364 100644
--- a/ash/host/ash_window_tree_host_unified.cc
+++ b/ash/host/ash_window_tree_host_unified.cc
@@ -14,6 +14,7 @@
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_targeter.h"
 #include "ui/compositor/compositor.h"
+#include "ui/gfx/geometry/dip_util.h"
 #include "ui/gfx/geometry/insets.h"
 #include "ui/platform_window/stub/stub_window.h"
 
@@ -51,7 +52,8 @@ AshWindowTreeHostUnified::AshWindowTreeHostUnified(
     const gfx::Rect& initial_bounds)
     : AshWindowTreeHostPlatform() {
   std::unique_ptr<ui::PlatformWindow> window(new ui::StubWindow(this));
-  window->SetBounds(initial_bounds);
+  window->SetBounds(gfx::ConvertRectToPixel(compositor()->device_scale_factor(),
+                                            initial_bounds));

[sadrul, 2016/11/21 17:39:50]

Hm, I actually think this doesn't need to be scaled. WindowTreeHost receives the
bounds in physical pixels.

[riajiang, 2016/11/21 19:24:22]

Done. As discussed offline, bounds_in_native is in pixel. 

   SetPlatformWindow(std::move(window));
 }