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

ui/base/dragdrop/drag_utils.cc

Index: ui/base/dragdrop/drag_utils.cc
diff --git a/ui/base/dragdrop/drag_utils.cc b/ui/base/dragdrop/drag_utils.cc
index 97e855c667b864a1cdeb43d6cfca5bb12b1b5cf2..5af65b2ff156d1548417b6bdb7e683d51082fc46 100644
--- a/ui/base/dragdrop/drag_utils.cc
+++ b/ui/base/dragdrop/drag_utils.cc
@@ -93,14 +93,14 @@ void CreateDragImageForFile(const FilePath& file_name,
   // ImageSkia takes ownership of |source|.
   gfx::ImageSkia image = gfx::ImageSkia(source, size);
 
-  SetDragImageOnDataObject(image, size,
-                           gfx::Point(size.width() / 2, kLinkDragImageVPadding),
-                           data_object);
+  SetDragImageOnDataObject(
+      image, size, gfx::Vector2d(size.width() / 2, kLinkDragImageVPadding),
+      data_object);
 }
 
 void SetDragImageOnDataObject(const gfx::Canvas& canvas,
                               const gfx::Size& size,
-                              const gfx::Point& cursor_offset,
+                              const gfx::Vector2d& cursor_offset,
                               ui::OSExchangeData* data_object) {
   gfx::ImageSkia image = gfx::ImageSkia(canvas.ExtractImageRep());
   SetDragImageOnDataObject(image, size, cursor_offset, data_object);