Basic DragImage implementation....

chrome/browser/renderer_host/render_view_host.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 531 matching lines @@
                                    IPC::Message* reply_msg);
   void OnMsgShowModalHTMLDialog(const GURL& url, int width, int height,
                                 const std::string& json_arguments,
                                 IPC::Message* reply_msg);
   void OnMsgFormsSeen(
       const std::vector<webkit_glue::FormFieldValues>& forms);
   void OnMsgPasswordFormsSeen(
       const std::vector<webkit_glue::PasswordForm>& forms);
   void OnMsgFormFieldValuesSubmitted(const webkit_glue::FormFieldValues& forms);
   void OnMsgStartDragging(const WebDropData& drop_data,
-                          WebKit::WebDragOperationsMask operations_allowed);
+                          WebKit::WebDragOperationsMask operations_allowed,
+                          const SkBitmap& image,
+                          const gfx::Point& image_offset);
   void OnUpdateDragCursor(WebKit::WebDragOperation drag_operation);
   void OnTakeFocus(bool reverse);
   void OnMsgPageHasOSDD(int32 page_id, const GURL& doc_url, bool autodetected);
   void OnDidGetPrintedPagesCount(int cookie, int number_pages);
   void DidPrintPage(const ViewHostMsg_DidPrintPage_Params& params);
   void OnAddMessageToConsole(const std::wstring& message,
                              int32 line_no,
                              const std::wstring& source_id);
 
   void OnUpdateInspectorSettings(const std::string& raw_settings);
@@ skipping 122 matching lines @@
   // True if the render view can be shut down suddenly.
   bool sudden_termination_allowed_;
 
   // The session storage namespace id to be used by the associated render view.
   int64 session_storage_namespace_id_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewHost);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_H_