Make all LayerAnimationElement::Create*Element return unique_ptr

ash/wm/window_animations.cc

Index: ash/wm/window_animations.cc
diff --git a/ash/wm/window_animations.cc b/ash/wm/window_animations.cc
index d10dca36819c4e45983b351395f0f5194a2f339f..c12e164c01a62db5596425226984e287cc572c0b 100644
--- a/ash/wm/window_animations.cc
+++ b/ash/wm/window_animations.cc
@@ -387,26 +387,25 @@ std::vector<ui::LayerAnimationSequence*>
 CreateBrightnessGrayscaleAnimationSequence(float target_value,
                                            base::TimeDelta duration) {
   gfx::Tween::Type animation_type = gfx::Tween::EASE_OUT;
-  std::unique_ptr<ui::LayerAnimationSequence> brightness_sequence(
-      new ui::LayerAnimationSequence());
-  std::unique_ptr<ui::LayerAnimationSequence> grayscale_sequence(
-      new ui::LayerAnimationSequence());
+  ui::LayerAnimationSequence* brightness_sequence =
+      new ui::LayerAnimationSequence();
+  ui::LayerAnimationSequence* grayscale_sequence =
+      new ui::LayerAnimationSequence();
 
-  std::unique_ptr<ui::LayerAnimationElement> brightness_element(
+  ui::LayerAnimationElement* brightness_element =
       ui::LayerAnimationElement::CreateBrightnessElement(target_value,
-                                                         duration));
+                                                         duration);
   brightness_element->set_tween_type(animation_type);
-  brightness_sequence->AddElement(brightness_element.release());
+  brightness_sequence->AddElement(brightness_element);
 
-  std::unique_ptr<ui::LayerAnimationElement> grayscale_element(
-      ui::LayerAnimationElement::CreateGrayscaleElement(target_value,
-                                                        duration));
+  ui::LayerAnimationElement* grayscale_element =
+      ui::LayerAnimationElement::CreateGrayscaleElement(target_value, duration);
   grayscale_element->set_tween_type(animation_type);
-  grayscale_sequence->AddElement(grayscale_element.release());
+  grayscale_sequence->AddElement(grayscale_element);
 
   std::vector<ui::LayerAnimationSequence*> animations;
-  animations.push_back(brightness_sequence.release());
-  animations.push_back(grayscale_sequence.release());
+  animations.push_back(brightness_sequence);
+  animations.push_back(grayscale_sequence);
 
   return animations;
 }