Support creation of toplevel mus::Windows on separate displays

ash/mus/root_window_controller.cc

Index: ash/mus/root_window_controller.cc
diff --git a/ash/mus/root_window_controller.cc b/ash/mus/root_window_controller.cc
index 4279731f0df65714c0b6267737bf9c288226dab0..2e0c6d2a728fce25f34d46360ff2ac587be36a47 100644
--- a/ash/mus/root_window_controller.cc
+++ b/ash/mus/root_window_controller.cc
@@ -103,8 +103,11 @@ ui::Window* RootWindowController::NewTopLevelWindow(
     container_window = GetWindowByShellWindowId(container_id)->mus_window();
   } else {
     // TODO(sky): window->bounds() isn't quite right.

[mfomitchev, 2016/11/17 17:14:01]

Remove this now?

[thanhph, 2016/11/17 19:08:30]

Done.

+    gfx::Rect* screen_bound = wm_root_window_controller_->ConvertWindowToScreen(
+        WmWindowMus::Get(window), window);
+
     container_window = WmWindowMus::GetMusWindow(wm::GetDefaultParent(
-        WmWindowMus::Get(root_), WmWindowMus::Get(window), window->bounds()));
+        WmWindowMus::Get(root_), WmWindowMus::Get(window), (*screen_bound)));
   }
   DCHECK(WmWindowMus::Get(container_window)->IsContainer());
 
@@ -114,9 +117,7 @@ ui::Window* RootWindowController::NewTopLevelWindow(
   } else {
     container_window->AddChild(window);
   }
-
   window_count_++;
-
   return window;
 }