Web Animations: Handle iteration values which overflow int.

Source/core/animation/InertEffect.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 40 matching lines @@
 void InertEffect::sample(OwnPtr<Vector<RefPtr<Interpolation>>>& result)
 {
     updateInheritedTime(m_inheritedTime, TimingUpdateOnDemand);
     if (!isInEffect()) {
         result.clear();
         return;
     }
 
     double iteration = currentIteration();
     ASSERT(iteration >= 0);
-    // FIXME: Handle iteration values which overflow int.
-    m_model->sample(static_cast<int>(iteration), timeFraction(), iterationDuration(), result);
+    m_model->sample(clampTo<int>(iteration, 0), timeFraction(), iterationDuration(), result);
 }
 
 double InertEffect::calculateTimeToEffectChange(bool, double, double) const
 {
     return std::numeric_limits<double>::infinity();
 }
 
 DEFINE_TRACE(InertEffect)
 {
     visitor->trace(m_model);
     AnimationEffect::trace(visitor);
 }
 
 } // namespace blink