Clamp the hotspot on custom cursors to the custom cursor image.

webkit/glue/webcursor.h

 // Copyright (c) 2006-2008 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 WEBKIT_GLUE_WEBCURSOR_H_
 #define WEBKIT_GLUE_WEBCURSOR_H_
 
 #include "base/basictypes.h"
 #include "gfx/point.h"
 #include "gfx/size.h"
@@ skipping 109 matching lines @@
 
   // Copies platform specific data from the WebCursor instance passed in.
   void CopyPlatformData(const WebCursor& other);
 
   // Platform specific cleanup.
   void CleanupPlatformData();
 
   void SetCustomData(const WebKit::WebImage& image);
   void ImageFromCustomData(WebKit::WebImage* image) const;
 
+  // Clamp the hotspot to the custom image's bounds, if this is a custom cursor.
+  void ClampHotspot();
+
   // WebCore::PlatformCursor type.
   int type_;
 
   gfx::Point hotspot_;
 
   // Custom cursor data, as 32-bit RGBA.
   // Platform-inspecific because it can be serialized.
   gfx::Size custom_size_;
   std::vector<char> custom_data_;
 
 #if defined(OS_WIN)
   // An externally generated HCURSOR. We assume that it remains valid, i.e we
   // don't attempt to copy the HCURSOR.
   HCURSOR external_cursor_;
   // A custom cursor created from custom bitmap data by Webkit.
   HCURSOR custom_cursor_;
 #endif  // OS_WIN
 };
 
 #endif  // WEBKIT_GLUE_WEBCURSOR_H_