linux-aura: Fix some dragging behaviour.

ui/views/widget/desktop_aura/desktop_root_window_host_x11.h

Index: ui/views/widget/desktop_aura/desktop_root_window_host_x11.h
diff --git a/ui/views/widget/desktop_aura/desktop_root_window_host_x11.h b/ui/views/widget/desktop_aura/desktop_root_window_host_x11.h
index 76a0821a6de8fff4dde8aab45dc5540812e2c916..291512c41bac3578e911315f4b7b859d4ca3d352 100644
--- a/ui/views/widget/desktop_aura/desktop_root_window_host_x11.h
+++ b/ui/views/widget/desktop_aura/desktop_root_window_host_x11.h
@@ -31,6 +31,7 @@ class DesktopDragDropClientAuraX11;
 class DesktopDispatcherClient;
 class DesktopRootWindowHostObserverX11;
 class X11DesktopWindowMoveClient;
+class X11ScopedCapture;
 class X11WindowEventFilter;
 
 class VIEWS_EXPORT DesktopRootWindowHostX11 :
@@ -281,6 +282,8 @@ private:
   // destroyed.
   static std::list<XID>* open_windows_;
 
+  scoped_ptr<X11ScopedCapture> x11_capture_;
+
   string16 window_title_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopRootWindowHostX11);