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

content/browser/web_contents/web_contents_view_gtk.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 "content/browser/web_contents/web_contents_view_gtk.h"
 
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
 #include <gtk/gtk.h>
 
@@ skipping 324 matching lines @@
                                        bool allow_multiple_selection) {
   // External popup menus are only used on Mac and Android.
   NOTIMPLEMENTED();
 }
 
 // Render view DnD -------------------------------------------------------------
 
 void WebContentsViewGtk::StartDragging(const WebDropData& drop_data,
                                        WebDragOperationsMask ops,
                                        const gfx::ImageSkia& image,
-                                       const gfx::Point& image_offset) {
+                                       const gfx::Vector2d& image_offset) {
   DCHECK(GetContentNativeView());
 
   RenderWidgetHostViewGtk* view_gtk = static_cast<RenderWidgetHostViewGtk*>(
       web_contents_->GetRenderWidgetHostView());
   if (!view_gtk || !view_gtk->GetLastMouseDown())
     return;
 
   drag_source_->StartDragging(drop_data, ops, view_gtk->GetLastMouseDown(),
                               *image.bitmap(), image_offset);
 }
@@ skipping 22 matching lines @@
   // We manually tell our RWHV to resize the renderer content.  This avoids
   // spurious resizes from GTK+.
   RenderWidgetHostView* rwhv = web_contents_->GetRenderWidgetHostView();
   if (rwhv)
     rwhv->SetSize(size);
   if (web_contents_->GetInterstitialPage())
     web_contents_->GetInterstitialPage()->SetSize(size);
 }
 
 }  // namespace content