Use SkMatrix44 for the underlying implementation of ui::Transform

views/view.cc

Index: views/view.cc
diff --git a/views/view.cc b/views/view.cc
index 10132d3e67f5973083a50f99694f07036289d159..615f475a60c4476ec3401566f556c14d2833c8d9 100644
--- a/views/view.cc
+++ b/views/view.cc
@@ -16,6 +16,7 @@
 #include "ui/gfx/canvas_skia.h"
 #include "ui/gfx/compositor/compositor.h"
 #include "ui/gfx/path.h"
+#include "ui/gfx/point3.h"
 #include "ui/gfx/transform.h"
 #include "views/background.h"
 #include "views/layout/layout_manager.h"
@@ -1570,7 +1571,9 @@ bool View::ConvertPointForAncestor(const View* ancestor,
   ui::Transform trans;
   // TODO(sad): Have some way of caching the transformation results.
   bool result = GetTransformRelativeTo(ancestor, &trans);
-  trans.TransformPoint(point);
+  gfx::Point3f p(*point);
+  trans.TransformPoint(p);
+  *point = p.AsPoint();
   return result;
 }
 
@@ -1578,7 +1581,9 @@ bool View::ConvertPointFromAncestor(const View* ancestor,
                                     gfx::Point* point) const {
   ui::Transform trans;
   bool result = GetTransformRelativeTo(ancestor, &trans);
-  trans.TransformPointReverse(point);
+  gfx::Point3f p(*point);
+  trans.TransformPointReverse(p);
+  *point = p.AsPoint();
   return result;
 }