Desktop Aura: Allow tab drags out of window.

ui/aura/root_window.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_AURA_ROOT_WINDOW_H_
 #define UI_AURA_ROOT_WINDOW_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 91 matching lines @@
   void set_focus_manager(FocusManager* focus_manager) {
     focus_manager_ = focus_manager;
   }
 
   // Initializes the root window.
   void Init();
 
   // Shows the root window host.
   void ShowRootWindow();
 
+  // Hides the root window host.
+  void HideRootWindow();
+
   RootWindowHostDelegate* AsRootWindowHostDelegate();
 
   // Sets the size of the root window.
   void SetHostSize(const gfx::Size& size_in_pixel);
   gfx::Size GetHostSize() const;
 
   // Sets the bounds of the host window.
   void SetHostBounds(const gfx::Rect& size_in_pixel);
 
   // Returns where the RootWindow is on screen.
@@ skipping 175 matching lines @@
   virtual void OnLayerAnimationAborted(
       ui::LayerAnimationSequence* animation) OVERRIDE;
 
   // Overridden from aura::RootWindowHostDelegate:
   virtual bool OnHostKeyEvent(ui::KeyEvent* event) OVERRIDE;
   virtual bool OnHostMouseEvent(ui::MouseEvent* event) OVERRIDE;
   virtual bool OnHostScrollEvent(ui::ScrollEvent* event) OVERRIDE;
   virtual bool OnHostTouchEvent(ui::TouchEvent* event) OVERRIDE;
   virtual void OnHostLostCapture() OVERRIDE;
   virtual void OnHostPaint() OVERRIDE;
+  virtual void OnHostMoved(const gfx::Point& origin) OVERRIDE;
   virtual void OnHostResized(const gfx::Size& size) OVERRIDE;
   virtual float GetDeviceScaleFactor() OVERRIDE;
   virtual RootWindow* AsRootWindow() OVERRIDE;
 
   // We hold and aggregate mouse drags as a way of throttling resizes when
   // HoldMouseMoves() is called. The following methods are used to dispatch held
   // and newly incoming mouse events, typically when an event other than a mouse
   // drag needs dispatching or a matching ReleaseMouseMoves() is called.
   // NOTE: because these methods dispatch events from RootWindowHost the
   // coordinates are in terms of the root.
@@ skipping 68 matching lines @@
 
   CompositorLock* compositor_lock_;
   bool draw_on_compositor_unlock_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindow);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_ROOT_WINDOW_H_