Undocks window first before side-snapping bounds

ash/wm/window_state.h

Index: ash/wm/window_state.h
diff --git a/ash/wm/window_state.h b/ash/wm/window_state.h
index 2bbdd035b0d127d001746d55ddfc9ba0b96d426b..bf0c70213b1178b5f1953e44615ec0ea04e95495 100644
--- a/ash/wm/window_state.h
+++ b/ash/wm/window_state.h
@@ -69,6 +69,7 @@ class ASH_EXPORT WindowState : public aura::WindowObserver {
   bool IsNormalShowState() const;
   bool IsActive() const;
   bool IsDocked() const;
+  bool IsSnapped() const;
 
   // Checks if the window can change its state accordingly.
   bool CanMaximize() const;
@@ -257,6 +258,9 @@ class ASH_EXPORT WindowState : public aura::WindowObserver {
   void SnapWindow(WindowShowType left_or_right,
                   const gfx::Rect& bounds);
 
+  // Allows window to be repositioned away from the screen edge.
+  void SetWindowShowTypeUnsnapped();
+
   // The owner of this window settings.
   aura::Window* window_;
   scoped_ptr<WindowStateDelegate> delegate_;