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

ash/display/screen_position_controller.h

Index: ash/display/screen_position_controller.h
diff --git a/ash/display/screen_position_controller.h b/ash/display/screen_position_controller.h
index 0d394804a27891ce85cfb5846dbe46c96885cedc..f83affb442dc72f61370769ab8b79c5b21685be9 100644
--- a/ash/display/screen_position_controller.h
+++ b/ash/display/screen_position_controller.h
@@ -22,7 +22,8 @@ class ScreenPositionController : public aura::client::ScreenPositionClient {
   virtual void ConvertPointFromScreen(const aura::Window* window,
                                       gfx::Point* point) OVERRIDE;
   virtual void SetBounds(aura::Window* window,
-                         const gfx::Rect& bounds) OVERRIDE;
+                         const gfx::Rect& bounds,
+                         const gfx::Display& display) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ScreenPositionController);