CC Animation: Extract PropertyAnimationState as a non-nested struct.

cc/animation/element_animations.h

 // Copyright 2015 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 CC_ANIMATION_ELEMENT_ANIMATIONS_H_
 #define CC_ANIMATION_ELEMENT_ANIMATIONS_H_
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
 #include "cc/animation/animation.h"
 #include "cc/animation/animation_curve.h"
 #include "cc/animation/animation_events.h"
+#include "cc/animation/property_animation_state.h"
 #include "cc/animation/target_property.h"
 #include "cc/base/cc_export.h"
 #include "ui/gfx/geometry/scroll_offset.h"
 #include "ui/gfx/transform.h"
 
 namespace gfx {
 class BoxF;
 }
 
 namespace cc {
@@ skipping 213 matching lines @@
 
   base::TimeTicks last_tick_time_;
 
   bool has_element_in_active_list_;
   bool has_element_in_pending_list_;
 
   bool scroll_offset_animation_was_interrupted_;
 
   bool needs_push_properties_;
 
-  struct PropertyAnimationState {
-    bool currently_running_for_active_elements = false;
-    bool currently_running_for_pending_elements = false;
-    bool potentially_animating_for_active_elements = false;
-    bool potentially_animating_for_pending_elements = false;
-    void Clear() {
-      currently_running_for_active_elements = false;
-      currently_running_for_pending_elements = false;
-      potentially_animating_for_active_elements = false;
-      potentially_animating_for_pending_elements = false;
-    }
-  };
-
-  struct PropertyAnimationState filter_animation_state_;
-  struct PropertyAnimationState opacity_animation_state_;
-  struct PropertyAnimationState transform_animation_state_;
+  PropertyAnimationState filter_animation_state_;
+  PropertyAnimationState opacity_animation_state_;
+  PropertyAnimationState transform_animation_state_;
 
   bool needs_update_impl_client_state_transform_ : 1;
   bool needs_update_impl_client_state_opacity_ : 1;
   bool needs_update_impl_client_state_filter_ : 1;
 
   DISALLOW_COPY_AND_ASSIGN(ElementAnimations);
 };
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_ELEMENT_ANIMATIONS_H_