Make all LayerAnimationElement::Create*Element return unique_ptr

ui/gfx/interpolated_transform.h

Index: ui/gfx/interpolated_transform.h
diff --git a/ui/gfx/interpolated_transform.h b/ui/gfx/interpolated_transform.h
index a22a0e774e51d57bb09f46d2b00f56f121daa3dc..3e0c6456641a610b8332a5af499781f8cd144391 100644
--- a/ui/gfx/interpolated_transform.h
+++ b/ui/gfx/interpolated_transform.h
@@ -42,7 +42,7 @@ class GFX_EXPORT InterpolatedTransform {
   // and our child's transform at time t (if we have one).
   //
   // This function takes ownership of the passed InterpolatedTransform.
-  void SetChild(InterpolatedTransform* child);
+  void SetChild(std::unique_ptr<InterpolatedTransform> child);
 
   // If the interpolated transform is reversed, Interpolate(t) will return
   // Interpolate(1 - t)
@@ -223,21 +223,24 @@ class GFX_EXPORT InterpolatedTransformAboutPivot
     : public InterpolatedTransform {
  public:
   // Takes ownership of the passed transform.
-  InterpolatedTransformAboutPivot(const gfx::Point& pivot,
-                                  InterpolatedTransform* transform);
+  InterpolatedTransformAboutPivot(
+      const gfx::Point& pivot,
+      std::unique_ptr<InterpolatedTransform> transform);
 
   // Takes ownership of the passed transform.
-  InterpolatedTransformAboutPivot(const gfx::Point& pivot,
-                                  InterpolatedTransform* transform,
-                                  float start_time,
-                                  float end_time);
+  InterpolatedTransformAboutPivot(
+      const gfx::Point& pivot,
+      std::unique_ptr<InterpolatedTransform> transform,
+      float start_time,
+      float end_time);
   ~InterpolatedTransformAboutPivot() override;
 
  protected:
   gfx::Transform InterpolateButDoNotCompose(float t) const override;
 
  private:
-  void Init(const gfx::Point& pivot, InterpolatedTransform* transform);
+  void Init(const gfx::Point& pivot,
+            std::unique_ptr<InterpolatedTransform> transform);
 
   std::unique_ptr<InterpolatedTransform> transform_;