Make all LayerAnimationElement::Create*Element return unique_ptr

ui/compositor/layer_animation_sequence.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_COMPOSITOR_LAYER_ANIMATION_SEQUENCE_H_
 #define UI_COMPOSITOR_LAYER_ANIMATION_SEQUENCE_H_
 
 #include <stddef.h>
 
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
 #include "ui/compositor/compositor_export.h"
 #include "ui/compositor/layer_animation_element.h"
 
 namespace ui {
 
 class LayerAnimationDelegate;
 class LayerAnimationObserver;
@@ skipping 105 matching lines @@
   // by this sequence. Returns 0.0 if no elements have been progressed.
   double last_progressed_fraction() const { return last_progressed_fraction_; }
 
   size_t size() const;
 
   LayerAnimationElement* FirstElement() const;
 
  private:
   friend class LayerAnimatorTestController;
 
-  typedef std::vector<linked_ptr<LayerAnimationElement> > Elements;
+  using Elements = std::vector<std::unique_ptr<LayerAnimationElement>>;
 
   FRIEND_TEST_ALL_PREFIXES(LayerAnimatorTest,
                            ObserverReleasedBeforeAnimationSequenceEnds);
 
   // Notifies the observers that this sequence has been scheduled.
   void NotifyScheduled();
 
   // Notifies the observers that this sequence has been started.
   void NotifyStarted();
 
@@ skipping 40 matching lines @@
   double last_progressed_fraction_;
 
   base::WeakPtrFactory<LayerAnimationSequence> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerAnimationSequence);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_LAYER_ANIMATION_SEQUENCE_H_