Use AnimationData::initialAnimationTimingFunction() in CSSAnimations::timingFromAnimationData()

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 61 matching lines @@
     if (animationData->isDurationSet()) {
         timing.iterationDuration = animationData->duration();
         timing.hasIterationDuration = true;
     }
     if (animationData->isIterationCountSet()) {
         if (animationData->iterationCount() == CSSAnimationData::IterationCountInfinite)
             timing.iterationCount = std::numeric_limits<double>::infinity();
         else
             timing.iterationCount = animationData->iterationCount();
     }
+    // For CSS animations, timing functions apply to individual keyframes, not
+    // to the complete animation.
+    // FIXME: Until chained timing functions are implemented, we simply apply
+    // the default timing function to the complete animation.
     if (animationData->isTimingFunctionSet()) {
         if (animationData->timingFunction()->type() != TimingFunction::LinearFunction)
             timing.timingFunction = animationData->timingFunction();
     } else {
-        // CSS default is ease, default in model is linear.
-        timing.timingFunction = CubicBezierTimingFunction::preset(CubicBezierTimingFunction::Ease);
+        timing.timingFunction = CSSAnimationData::initialAnimationTimingFunction();
     }
     if (animationData->isFillModeSet()) {
         switch (animationData->fillMode()) {
         case AnimationFillModeForwards:
             timing.fillMode = Timing::FillModeForwards;
             break;
         case AnimationFillModeBackwards:
             timing.fillMode = Timing::FillModeBackwards;
             break;
         case AnimationFillModeBoth:
@@ skipping 281 matching lines @@
     case CSSPropertyWordSpacing:
     case CSSPropertyZIndex:
     case CSSPropertyZoom:
         return true;
     default:
         return false;
     }
 }
 
 } // namespace WebCore