Implement drag and drop testing in a platform independent way.

chrome/browser/ui/panels/native_panel.h

Index: chrome/browser/ui/panels/native_panel.h
diff --git a/chrome/browser/ui/panels/native_panel.h b/chrome/browser/ui/panels/native_panel.h
index a67fe19f9589a65c31b1ef45c51f0c849e18b604..74d677ec37bfe864e88d7675598213af95c5aacb 100644
--- a/chrome/browser/ui/panels/native_panel.h
+++ b/chrome/browser/ui/panels/native_panel.h
@@ -62,18 +62,23 @@ class NativePanel {
   virtual bool IsDrawingAttention() const = 0;
   virtual Browser* GetPanelBrowser() const = 0;
   virtual void DestroyPanelBrowser() = 0;
-
-  // Returns a pointer to the testing interface to the native panel.
-  virtual NativePanelTesting* GetNativePanelTesting() = 0;
 };
 
 // A NativePanel utility interface used for accessing elements of the
 // native panel used only by test automation.
 class NativePanelTesting {
  public:
+  static NativePanelTesting* Create(NativePanel* native_panel);
 
- protected:
+  // Need a virtual destructor defined to be able to use the instance inside a
+  // scoped_ptr<>.
   virtual ~NativePanelTesting() {}
+
+  virtual void PressLeftMouseButtonTitlebar(const gfx::Point& point) = 0;
+  virtual void ReleaseMouseButtonTitlebar() = 0;
+  virtual void DragTitlebar(int delta_x, int delta_y) = 0;
+  virtual void CancelDragTitlebar() = 0;
+  virtual void FinishDragTitlebar() = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_NATIVE_PANEL_H_