Clean up stale FIXMEs and TODOs in core/animation

third_party/WebKit/Source/core/animation/css/CSSAnimations.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 135 matching lines @@
     if (endKeyframe->offset() != 1) {
         endKeyframe = StringKeyframe::create();
         endKeyframe->setOffset(1);
         endKeyframe->setEasing(defaultTimingFunction);
         keyframes.append(endKeyframe);
     }
     DCHECK_GE(keyframes.size(), 2U);
     DCHECK(!keyframes.first()->offset());
     DCHECK_EQ(keyframes.last()->offset(), 1);
 
-    // FIXME: This is only used for use counting neutral keyframes running on the compositor.
+    // This is used for use counting neutral keyframes running on the compositor.
     PropertySet allProperties;
     for (const auto& keyframe : keyframes) {
         for (const auto& property : keyframe->properties())
             allProperties.add(property.cssProperty());
     }
     const PropertyHandleSet& startKeyframeProperties = startKeyframe->properties();
     const PropertyHandleSet& endKeyframeProperties = endKeyframe->properties();
     bool missingStartValues = startKeyframeProperties.size() < allProperties.size();
     bool missingEndValues = endKeyframeProperties.size() < allProperties.size();
     if (missingStartValues || missingEndValues) {
@@ skipping 730 matching lines @@
 }
 
 DEFINE_TRACE(CSSAnimations)
 {
     visitor->trace(m_transitions);
     visitor->trace(m_pendingUpdate);
     visitor->trace(m_runningAnimations);
 }
 
 } // namespace blink