Basic DragImage implementation....

chrome/browser/cocoa/notifications/balloon_view_host_mac.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_COCOA_NOTIFICATIONS_BALLOON_VIEW_HOST_MAC_H_
 #define CHROME_BROWSER_COCOA_NOTIFICATIONS_BALLOON_VIEW_HOST_MAC_H_
 
 #include "app/gfx/native_widget_types.h"
 #include "chrome/browser/notifications/balloon.h"
 #include "chrome/browser/renderer_host/render_view_host_delegate.h"
 #import "chrome/browser/renderer_host/render_widget_host_view_mac.h"
 #include "chrome/browser/renderer_host/site_instance.h"
 #include "chrome/browser/tab_contents/render_view_host_delegate_helper.h"
 #include "webkit/glue/webpreferences.h"
 
 class Profile;
 class RenderViewHost;
+class SkBitmap;
+namespace gfx {
+class Point;
+}
 
 // BalloonViewHost class is a delegate to the renderer host for the HTML
 // notification.  When initialized it creates a new RenderViewHost and loads
 // the contents of the toast into it.  It also handles links within the toast,
 // loading them into a new tab.
 class BalloonViewHost : public RenderViewHostDelegate,
                         public RenderViewHostDelegate::View {
  public:
   explicit BalloonViewHost(Balloon* balloon);
 
@@ skipping 41 matching lines @@
   virtual void CreateNewWindow(int route_id);
   virtual void CreateNewWidget(int route_id, bool activatable) {}
   virtual void ShowCreatedWindow(int route_id,
                                  WindowOpenDisposition disposition,
                                  const gfx::Rect& initial_pos,
                                  bool user_gesture);
   virtual void ShowCreatedWidget(int route_id,
                                  const gfx::Rect& initial_pos) {}
   virtual void ShowContextMenu(const ContextMenuParams& params) {}
   virtual void StartDragging(const WebDropData& drop_data,
-                             WebKit::WebDragOperationsMask allowed_ops) {}
+                             WebKit::WebDragOperationsMask allowed_ops,
+                             const SkBitmap& image,
+                             const gfx::Point& image_offset) {}
   virtual void UpdateDragCursor(WebKit::WebDragOperation operation) {}
   virtual void GotFocus() {}
   virtual void TakeFocus(bool reverse) {}
   virtual bool PreHandleKeyboardEvent(const NativeWebKeyboardEvent& event,
                                       bool* is_keyboard_shortcut) {
     return false;
   }
   virtual void HandleKeyboardEvent(const NativeWebKeyboardEvent& event) {}
   virtual void HandleMouseEvent() {}
   virtual void HandleMouseLeave() {}
@@ skipping 31 matching lines @@
   // which this class frees in its destructor.
   RenderWidgetHostViewMac* render_widget_host_view_;
 
   // Common implementations of some RenderViewHostDelegate::View methods.
   RenderViewHostDelegateViewHelper delegate_view_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(BalloonViewHost);
 };
 
 #endif  // CHROME_BROWSER_COCOA_NOTIFICATIONS_BALLOON_VIEW_HOST_MAC_H_