Mozart: Compute hits using 4x4 matrix.

services/gfx/compositor/graph/scene_content.h

Index: services/gfx/compositor/graph/scene_content.h
diff --git a/services/gfx/compositor/graph/scene_content.h b/services/gfx/compositor/graph/scene_content.h
index 60777633a9ae3544c82b784de2b0bc9f910530c7..c0967ffd2ee4b43aa67c68b39eef51c5fc00afd0 100644
--- a/services/gfx/compositor/graph/scene_content.h
+++ b/services/gfx/compositor/graph/scene_content.h
@@ -19,7 +19,7 @@
 
 class SkCanvas;
 struct SkPoint;
-class SkMatrix;
+class SkMatrix44;
 
 namespace compositor {
 
@@ -65,7 +65,7 @@ class SceneContent : public base::RefCounted<SceneContent> {
   // Returns true if the search was terminated by an opaque hit.
   bool HitTest(const Snapshot* snapshot,
                const SkPoint& scene_point,
-               const SkMatrix& global_to_scene_transform,
+               const SkMatrix44& global_to_scene_transform,
                mojo::gfx::composition::SceneHitPtr* out_scene_hit) const;
 
   // Gets the requested resource, never null because it must be present.