Improve WorkspaceWindowResizer::CompleteDrag() so that the function moves the window to a root windo

ui/aura/client/screen_position_client.h

Index: ui/aura/client/screen_position_client.h
diff --git a/ui/aura/client/screen_position_client.h b/ui/aura/client/screen_position_client.h
index 3384c4474cb1c2aecdc134f06a4e021de5d99ea5..17e73d88b459f3dfe9ffa5bf7ee2b3884f438074 100644
--- a/ui/aura/client/screen_position_client.h
+++ b/ui/aura/client/screen_position_client.h
@@ -9,6 +9,7 @@
 #include "ui/aura/window.h"
 
 namespace gfx {
+class Display;
 class Rect;
 }
 
@@ -32,7 +33,9 @@ class AURA_EXPORT ScreenPositionClient {
                                       gfx::Point* point) = 0;
   // Sets the bounds of the window. The implementation is responsible
   // for finding out and translating the right coordinates for the |window|.
-  virtual void SetBounds(Window* window, const gfx::Rect& bounds) = 0;
+  virtual void SetBounds(Window* window,
+                         const gfx::Rect& bounds,
+                         const gfx::Display& display) = 0;
   virtual ~ScreenPositionClient() {}
 };