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

content/port/browser/render_view_host_delegate_view.h

Index: content/port/browser/render_view_host_delegate_view.h
diff --git a/content/port/browser/render_view_host_delegate_view.h b/content/port/browser/render_view_host_delegate_view.h
index b59d6e02411fda0dd03669604d92f2a3539799e3..4b84cb84d1b6bb12ec256482d30d7667ad5aaa49 100644
--- a/content/port/browser/render_view_host_delegate_view.h
+++ b/content/port/browser/render_view_host_delegate_view.h
@@ -18,8 +18,8 @@ struct WebMenuItem;
 
 namespace gfx {
 class ImageSkia;
-class Point;
 class Rect;
+class Vector2d;
 }
 
 namespace content {
@@ -53,7 +53,7 @@ class CONTENT_EXPORT RenderViewHostDelegateView {
   virtual void StartDragging(const WebDropData& drop_data,
                              WebKit::WebDragOperationsMask allowed_ops,
                              const gfx::ImageSkia& image,
-                             const gfx::Point& image_offset) {}
+                             const gfx::Vector2d& image_offset) {}
 
   // The page wants to update the mouse cursor during a drag & drop operation.
   // |operation| describes the current operation (none, move, copy, link.)