Fix flakiness of DesktopDragDropClientAuraX11Tests

ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h

Index: ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h
diff --git a/ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h b/ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h
index cf3665ecac6c8d968340e85121419cf6570c0bbd..e4a8adad1ef4bd6e01c7bcee295a756e0fd469bc 100644
--- a/ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h
+++ b/ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h
@@ -12,7 +12,8 @@
 #include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/vector2d_f.h"
-#include "ui/views/widget/desktop_aura/x11_whole_screen_move_loop_delegate.h"
+#include "ui/views/widget/desktop_aura/x11_move_loop.h"
+#include "ui/views/widget/desktop_aura/x11_move_loop_delegate.h"
 
 typedef struct _XDisplay XDisplay;
 
@@ -30,29 +31,23 @@ class Widget;
 
 // Runs a nested message loop and grabs the mouse. This is used to implement
 // dragging.
-class X11WholeScreenMoveLoop : public ui::PlatformEventDispatcher {
+class X11WholeScreenMoveLoop : public X11MoveLoop,
+                               public ui::PlatformEventDispatcher {
  public:
-  explicit X11WholeScreenMoveLoop(X11WholeScreenMoveLoopDelegate* delegate);
+  explicit X11WholeScreenMoveLoop(X11MoveLoopDelegate* delegate);
   virtual ~X11WholeScreenMoveLoop();
 
   // ui:::PlatformEventDispatcher:
   virtual bool CanDispatchEvent(const ui::PlatformEvent& event) OVERRIDE;
   virtual uint32_t DispatchEvent(const ui::PlatformEvent& event) OVERRIDE;
 
-  // Runs the nested message loop. While the mouse is grabbed, use |cursor| as
-  // the mouse cursor. Returns true if the move-loop is completed successfully.
-  // If the pointer-grab fails, or the move-loop is canceled by the user (e.g.
-  // by pressing escape), then returns false.
-  bool RunMoveLoop(aura::Window* window, gfx::NativeCursor cursor);
-
-  // Updates the cursor while the move loop is running.
-  void UpdateCursor(gfx::NativeCursor cursor);
-
-  // Ends the RunMoveLoop() that's currently in progress.
-  void EndMoveLoop();
-
-  // Sets an image to be used during the drag.
-  void SetDragImage(const gfx::ImageSkia& image, gfx::Vector2dF offset);
+  // X11MoveLoop:
+  virtual bool RunMoveLoop(aura::Window* window,
+                           gfx::NativeCursor cursor) OVERRIDE;
+  virtual void UpdateCursor(gfx::NativeCursor cursor) OVERRIDE;
+  virtual void EndMoveLoop() OVERRIDE;
+  virtual void SetDragImage(const gfx::ImageSkia& image,
+                            const gfx::Vector2dF& offset) OVERRIDE;
 
  private:
   // Grabs the pointer and keyboard, setting the mouse cursor to |cursor|.
@@ -72,7 +67,7 @@ class X11WholeScreenMoveLoop : public ui::PlatformEventDispatcher {
   // Dispatch mouse movement event to |delegate_| in a posted task.
   void DispatchMouseMovement();
 
-  X11WholeScreenMoveLoopDelegate* delegate_;
+  X11MoveLoopDelegate* delegate_;
 
   // Are we running a nested message loop from RunMoveLoop()?
   bool in_move_loop_;