Fix bug 105043: Panels [WIN]: For minimize panels, taskbar hover preview show the 4-pixel represent…

ui/views/widget/widget_delegate.h

Index: ui/views/widget/widget_delegate.h
diff --git a/ui/views/widget/widget_delegate.h b/ui/views/widget/widget_delegate.h
index 0f9440ac28de7a485797627a804bca6405d9df80..1becfa75b1d59a064560ee9e7003b692c105c5e0 100644
--- a/ui/views/widget/widget_delegate.h
+++ b/ui/views/widget/widget_delegate.h
@@ -147,6 +147,13 @@ class VIEWS_EXPORT WidgetDelegate {
   // manage the positions by ourselves.
   virtual bool WillProcessWorkAreaChange() const;
 
+  // Returns the preview image that appears when a user moves the mouse
+  // pointer over the window's thumbnail in the taskbar. This is only supported
+  // int Windows 7 and later.
+  // The returned image should not exceed |size|. If |live| is true, the image
+  // is used for live preview. Otherwise, it is shown as thumbnail.
+  virtual SkBitmap GetPreviewImage(const gfx::Size& size, bool live);
+
  protected:
   virtual ~WidgetDelegate() {}