Animation: Allow cubic-bezier timing inputs outside the range [0, 1] in CC

Source/core/animation/CompositorAnimations.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 155 matching lines @@
             default:
                 return false;
             }
         }
     }
 
     CompositorAnimationsImpl::CompositorTiming out;
     if (!CompositorAnimationsImpl::convertTimingForCompositor(timing, 0, out, playerPlaybackRate))
         return false;
 
-    if (timing.timingFunction->type() == TimingFunction::CubicBezierFunction) {
-        // FIXME: Fix compositor timing functions to accept inputs outside of
-        // [0,1].
-        const CubicBezierTimingFunction& cubic = toCubicBezierTimingFunction(*timing.timingFunction);
-        const KeyframeVector& keyframes = keyframeEffect.getFrames();
-        double startRange = 0;
-        double endRange = 1;
-        cubic.range(&startRange, &endRange);
-
-        ASSERT(keyframes.size() >= 2);
-        if ((startRange < 0 || endRange > 1) && (keyframes.first()->easing().type() != TimingFunction::LinearFunction || keyframes[keyframes.size() - 2]->easing().type() != TimingFunction::LinearFunction))
-            return false;
-    }
-
     return true;
 }
 
 bool CompositorAnimations::canStartAnimationOnCompositor(const Element& element)
 {
     return element.renderer() && element.renderer()->compositingState() == PaintsIntoOwnBacking;
 }
 
 bool CompositorAnimations::startAnimationOnCompositor(const Element& element, int group, double startTime, double timeOffset, const Timing& timing, const AnimationEffect& effect, Vector<int>& startedAnimationIds, double playerPlaybackRate)
 {
@@ skipping 350 matching lines @@
             break;
         default:
             ASSERT_NOT_REACHED();
         }
         animations.append(animation.release());
     }
     ASSERT(!animations.isEmpty());
 }
 
 } // namespace blink