Add Vector2d classes that represent offsets, instead of using Point.

ui/base/dragdrop/os_exchange_data_provider_gtk.cc

 // Copyright (c) 2011 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.
 
 #include "ui/base/dragdrop/os_exchange_data_provider_gtk.h"
 
 #include <algorithm>
 
 #include "base/file_path.h"
 #include "base/utf_string_conversions.h"
@@ skipping 203 matching lines @@
 
   GURL test_url(string_);
   if (!test_url.is_valid())
     return false;
 
   if (url)
     *url = test_url;
   return true;
 }
 
-void OSExchangeDataProviderGtk::SetDragImage(GdkPixbuf* drag_image,
-                                             const gfx::Point& cursor_offset) {
+void OSExchangeDataProviderGtk::SetDragImage(
+    GdkPixbuf* drag_image,
+    const gfx::Vector2d& cursor_offset) {
   if (drag_image_)
     g_object_unref(drag_image_);
   g_object_ref(drag_image);
   drag_image_ = drag_image;
   cursor_offset_ = cursor_offset;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // OSExchangeData, public:
 
 // static
 OSExchangeData::Provider* OSExchangeData::CreateProvider() {
   return new OSExchangeDataProviderGtk();
 }
 
 GdkAtom OSExchangeData::RegisterCustomFormat(const std::string& type) {
   return gdk_atom_intern(type.c_str(), false);
 }
 
 }  // namespace ui