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

Source/core/html/track/TextTrackCueGeneric.h

Index: Source/core/html/track/TextTrackCueGeneric.h
diff --git a/Source/core/html/track/TextTrackCueGeneric.h b/Source/core/html/track/TextTrackCueGeneric.h
index 39ba418a9c09f734e418f01fc529dc59fae7724e..292f7272f2cd6139a94890868dd1fd70a76f3e88 100644
--- a/Source/core/html/track/TextTrackCueGeneric.h
+++ b/Source/core/html/track/TextTrackCueGeneric.h
@@ -40,7 +40,7 @@ public:
     {
         return adoptRef(new TextTrackCueGeneric(context, start, end, content));
     }
-    
+
     virtual ~TextTrackCueGeneric() { }
 
     virtual PassRefPtr<TextTrackCueBox> createDisplayTree() OVERRIDE;
@@ -49,7 +49,7 @@ public:
     virtual void setPosition(int, ExceptionCode&) OVERRIDE;
 
     bool useDefaultPosition() const { return m_defaultPosition; }
-    
+
     double baseFontSizeRelativeToVideoHeight() const { return m_baseFontSizeRelativeToVideoHeight; }
     void setBaseFontSizeRelativeToVideoHeight(double size) { m_baseFontSizeRelativeToVideoHeight = size; }
 
@@ -61,7 +61,7 @@ public:
 
     Color foregroundColor() const { return m_foregroundColor; }
     void setForegroundColor(Color color) { m_foregroundColor = color; }
-    
+
     Color backgroundColor() const { return m_backgroundColor; }
     void setBackgroundColor(Color color) { m_backgroundColor = color; }
 
@@ -77,7 +77,7 @@ public:
 
 private:
     TextTrackCueGeneric(ScriptExecutionContext*, double start, double end, const String&);
-    
+
     Color m_foregroundColor;
     Color m_backgroundColor;
     double m_baseFontSizeRelativeToVideoHeight;