Web Animations: Remove confusing interpolation subdirectory.

Source/core/animation/InertAnimation.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 12 matching lines @@
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/animation/InertAnimation.h"
-#include "core/animation/interpolation/Interpolation.h"
+#include "core/animation/Interpolation.h"
 
 namespace blink {
 
 PassRefPtrWillBeRawPtr<InertAnimation> InertAnimation::create(PassRefPtrWillBeRawPtr<AnimationEffect> effect, const Timing& timing, bool paused)
 {
     return adoptRefWillBeNoop(new InertAnimation(effect, timing, paused));
 }
 
 InertAnimation::InertAnimation(PassRefPtrWillBeRawPtr<AnimationEffect> effect, const Timing& timing, bool paused)
     : AnimationNode(timing)
@@ skipping 19 matching lines @@
     return std::numeric_limits<double>::infinity();
 }
 
 void InertAnimation::trace(Visitor* visitor)
 {
     visitor->trace(m_effect);
     AnimationNode::trace(visitor);
 }
 
 } // namespace blink