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

Source/core/css/CSSFontSelector.h

Index: Source/core/css/CSSFontSelector.h
diff --git a/Source/core/css/CSSFontSelector.h b/Source/core/css/CSSFontSelector.h
index 7c4da6d2c16eb62704dbaa04d3d331b180fd44f3..bf097b41f2d9a0b658e6c7137ffd1c491f8fb8d9 100644
--- a/Source/core/css/CSSFontSelector.h
+++ b/Source/core/css/CSSFontSelector.h
@@ -51,7 +51,7 @@ public:
         return adoptRef(new CSSFontSelector(document));
     }
     virtual ~CSSFontSelector();
-    
+
     virtual unsigned version() const OVERRIDE { return m_version; }
 
     virtual PassRefPtr<FontData> getFontData(const FontDescription&, const AtomicString&);
@@ -88,7 +88,7 @@ private:
 
     Vector<CachedResourceHandle<CachedFont> > m_fontsToBeginLoading;
     Timer<CSSFontSelector> m_beginLoadingTimer;
-    
+
     unsigned m_version;
 };