Allow content embedder to set a cursor for RenderWidgetHost

content/public/browser/render_widget_host.h

 // Copyright (c) 2012 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 CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/common/drop_data.h"
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_sender.h"
 #include "third_party/WebKit/public/platform/WebDragOperation.h"
 #include "third_party/WebKit/public/platform/WebGestureEvent.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 #include "third_party/WebKit/public/web/WebTextDirection.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/surface/transport_dib.h"
 
 namespace blink {
 class WebMouseEvent;
 class WebMouseWheelEvent;
 }
 
 namespace content {
 
+struct CursorInfo;
 class RenderProcessHost;
 class RenderWidgetHostIterator;
 class RenderWidgetHostView;
 struct ScreenInfo;
 
 // A RenderWidgetHost manages the browser side of a browser<->renderer
 // HWND connection.  The HWND lives in the browser process, and
 // windows events are sent over IPC to the corresponding object in the
 // renderer.  The renderer paints into shared memory, which we
 // transfer to a backing store and blit to the screen when Windows
@@ skipping 216 matching lines @@
   virtual void DragSourceEndedAt(const gfx::Point& client_pt,
                                  const gfx::Point& screen_pt,
                                  blink::WebDragOperation operation) {};
 
   // Notifies the renderer that we're done with the drag and drop operation.
   // This allows the renderer to reset some state.
   virtual void DragSourceSystemDragEnded() {};
 
   // Filters drop data before it is passed to RenderWidgetHost.
   virtual void FilterDropData(DropData* drop_data) {}
+
+  // Sets cursor to a specified one when it is over this widget.
+  virtual void SetCursor(const CursorInfo& cursor_info) {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_