ui: Remove SkCanvas methods from drag utils.

ui/views/drag_utils.h

Index: ui/views/drag_utils.h
diff --git a/ui/views/drag_utils.h b/ui/views/drag_utils.h
index 5f2c5b52316806c5b235a9dd16b2074746e1b232..e6f778e4f3105e01fbc265a0e5ba102436ba544f 100644
--- a/ui/views/drag_utils.h
+++ b/ui/views/drag_utils.h
@@ -10,9 +10,7 @@
 #include "ui/views/views_export.h"
 
 namespace gfx {
-class Canvas;
 class Point;
-class Size;
 }
 
 namespace ui {
@@ -33,11 +31,6 @@ VIEWS_EXPORT void RunShellDrag(gfx::NativeView view,
 // native view.
 VIEWS_EXPORT float ScaleFactorForDragFromWidget(const Widget* widget);
 
-// Returns a canvas that can be used to draw the drag image. Caller owns the
-// returned object. |widget| is Widget hosting the view being dragged.
-VIEWS_EXPORT gfx::Canvas* GetCanvasForDragImage(const Widget* widget,
-                                                const gfx::Size& canvas_size);
-
 }  // namespace views
 
 #endif  // UI_VIEWS_DRAG_UTILS_H_