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

chrome/browser/ui/views/bookmarks/bookmark_bar_view.cc

 // 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.
 
 #include "chrome/browser/ui/views/bookmarks/bookmark_bar_view.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 #include <vector>
@@ skipping 937 matching lines @@
                                            const gfx::Point& press_pt,
                                            ui::OSExchangeData* data) {
   content::RecordAction(UserMetricsAction("BookmarkBar_DragButton"));
 
   for (int i = 0; i < GetBookmarkButtonCount(); ++i) {
     if (sender == GetBookmarkButton(i)) {
       views::TextButton* button = GetBookmarkButton(i);
       scoped_ptr<gfx::Canvas> canvas(
           views::GetCanvasForDragImage(button->GetWidget(), button->size()));
       button->PaintButton(canvas.get(), views::TextButton::PB_FOR_DRAG);
-      drag_utils::SetDragImageOnDataObject(*canvas, button->size(), press_pt,
+      drag_utils::SetDragImageOnDataObject(*canvas, button->size(),
+                                           press_pt.DistanceFromOrigin(),
                                            data);
       WriteBookmarkDragData(model_->bookmark_bar_node()->GetChild(i), data);
       return;
     }
   }
   NOTREACHED();
 }
 
 int BookmarkBarView::GetDragOperationsForView(View* sender,
                                               const gfx::Point& p) {
@@ skipping 716 matching lines @@
               (1 - size_animation_->GetCurrentValue())));
     } else {
       prefsize.set_height(
           static_cast<int>(
               browser_defaults::kBookmarkBarHeight *
               size_animation_->GetCurrentValue()));
     }
   }
   return prefsize;
 }