Fix trailing whitespace in .cpp, .h, and .idl files

Source/core/page/animation/KeyframeAnimation.h

Index: Source/core/page/animation/KeyframeAnimation.h
diff --git a/Source/core/page/animation/KeyframeAnimation.h b/Source/core/page/animation/KeyframeAnimation.h
index 0ff4604b0dce29e6e377bcb13ab14d23acb5d1a0..0d8b159c11fa03225191e0d5d7ad0bfdccf3f673 100644
--- a/Source/core/page/animation/KeyframeAnimation.h
+++ b/Source/core/page/animation/KeyframeAnimation.h
@@ -6,13 +6,13 @@
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
- *     notice, this list of conditions and the following disclaimer. 
+ *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution. 
+ *     documentation and/or other materials provided with the distribution.
  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  *     its contributors may be used to endorse or promote products derived
- *     from this software without specific prior written permission. 
+ *     from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
@@ -54,7 +54,7 @@ public:
     void setIndex(int i) { m_index = i; }
 
     bool hasAnimationForProperty(CSSPropertyID) const;
-    
+
     void setUnanimatedStyle(PassRefPtr<RenderStyle> style) { m_unanimatedStyle = style; }
     RenderStyle* unanimatedStyle() const { return m_unanimatedStyle.get(); }
 
@@ -82,7 +82,7 @@ protected:
 private:
     KeyframeAnimation(const CSSAnimationData* animation, RenderObject*, int index, CompositeAnimation*, RenderStyle* unanimatedStyle);
     virtual ~KeyframeAnimation();
-    
+
     // Get the styles for the given property surrounding the current animation time and the progress between them.
     void fetchIntervalEndpointsForProperty(CSSPropertyID, const RenderStyle*& fromStyle, const RenderStyle*& toStyle, double& progress) const;