Web animations: Supply CSS transition easing

Source/core/animation/InertAnimation.cpp

Index: Source/core/animation/InertAnimation.cpp
diff --git a/Source/core/animation/InertAnimation.cpp b/Source/core/animation/InertAnimation.cpp
index a82b6ca656f3a5b1bd2cd9d43cb73e1278dbbc8e..2c6e823b34601785d3bca3db82e1c80059610e2b 100644
--- a/Source/core/animation/InertAnimation.cpp
+++ b/Source/core/animation/InertAnimation.cpp
@@ -55,7 +55,7 @@ PassOwnPtr<Vector<RefPtr<Interpolation> > > InertAnimation::sample()
     double iteration = currentIteration();
     ASSERT(iteration >= 0);
     // FIXME: Handle iteration values which overflow int.
-    return m_effect->sample(static_cast<int>(iteration), timeFraction());
+    return m_effect->sample(static_cast<int>(iteration), timeFraction(), duration());
 }