Make AnimationEffectReadOnly.getComputedTiming() consistent with Web Animations spec

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 521 matching lines @@
     if (AnimatableValue::usesDefaultInterpolation(to.get(), from.get()))
         return;
 
     Timing timing = transitionData.convertToTiming(transitionIndex);
     if (timing.startDelay + timing.iterationDuration <= 0)
         return;
 
     AnimatableValue* reversingAdjustedStartValue = from.get();
     double reversingShorteningFactor = 1;
     if (interruptedTransition) {
-        const double interruptedTimeFraction = interruptedTransition->animation->effect()->timeFraction();
-        if (!std::isnan(interruptedTimeFraction)) {
+        const double interruptedProgress = interruptedTransition->animation->effect()->progress();
+        if (!std::isnan(interruptedProgress)) {
             // const_cast because we need to take a ref later when passing to startTransition.
             reversingAdjustedStartValue = const_cast<AnimatableValue*>(interruptedTransition->to);
             reversingShorteningFactor = clampTo(
-                (interruptedTimeFraction * interruptedTransition->reversingShorteningFactor) +
+                (interruptedProgress * interruptedTransition->reversingShorteningFactor) +
                 (1 - interruptedTransition->reversingShorteningFactor), 0.0, 1.0);
             timing.iterationDuration *= reversingShorteningFactor;
             if (timing.startDelay < 0) {
                 timing.startDelay *= reversingShorteningFactor;
             }
         }
     }
 
     AnimatableValueKeyframeVector keyframes;
     double startKeyframeOffset = 0;
@@ skipping 310 matching lines @@
 }
 
 DEFINE_TRACE(CSSAnimations)
 {
     visitor->trace(m_transitions);
     visitor->trace(m_pendingUpdate);
     visitor->trace(m_runningAnimations);
 }
 
 } // namespace blink