Basic DragImage implementation....

chrome/renderer/render_view.h

Index: chrome/renderer/render_view.h
===================================================================
--- chrome/renderer/render_view.h	(revision 41111)
+++ chrome/renderer/render_view.h	(working copy)
@@ -102,12 +102,14 @@
 class WebAccessibilityCache;
 class WebDataSource;
 class WebDragData;
+class WebImage;
 class WebMediaPlayer;
 class WebMediaPlayerClient;
 class WebStorageNamespace;
 class WebURLRequest;
 struct WebFileChooserParams;
 struct WebFindOptions;
+struct WebPoint;
 }
 
 // We need to prevent a page from trying to create infinite popups. It is not
@@ -248,8 +250,13 @@
   virtual void setToolTipText(
       const WebKit::WebString& text, WebKit::WebTextDirection hint);
   virtual void startDragging(
-      const WebKit::WebPoint& from, const WebKit::WebDragData& data,
+      const WebKit::WebDragData& data,
       WebKit::WebDragOperationsMask mask);
+  virtual void startDragging(
+      const WebKit::WebDragData& data,
+      WebKit::WebDragOperationsMask mask,
+      const WebKit::WebImage& image,
+      const WebKit::WebPoint& imageOffset);
   virtual bool acceptsLoadDrops();
   virtual void focusNext();
   virtual void focusPrevious();