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

ui/base/dragdrop/drag_utils_aura.cc

Index: ui/base/dragdrop/drag_utils_aura.cc
diff --git a/ui/base/dragdrop/drag_utils_aura.cc b/ui/base/dragdrop/drag_utils_aura.cc
index 63a22aa0a0c339511b44ef092b22623f7df03144..07fd467e45314f5795bcf2708b58b91b70ce4151 100644
--- a/ui/base/dragdrop/drag_utils_aura.cc
+++ b/ui/base/dragdrop/drag_utils_aura.cc
@@ -9,14 +9,14 @@
 #include "ui/base/dragdrop/os_exchange_data_provider_aura.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/image/image_skia.h"
-#include "ui/gfx/point.h"
 #include "ui/gfx/size.h"
+#include "ui/gfx/vector2d.h"
 
 namespace drag_utils {
 
 void SetDragImageOnDataObject(const gfx::ImageSkia& image,
                               const gfx::Size& size,
-                              const gfx::Point& cursor_offset,
+                              const gfx::Vector2d& cursor_offset,
                               ui::OSExchangeData* data_object) {
   ui::OSExchangeDataProviderAura& provider(
       static_cast<ui::OSExchangeDataProviderAura&>(data_object->provider()));