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

Source/core/css/CSSImportRule.cpp

Index: Source/core/css/CSSImportRule.cpp
diff --git a/Source/core/css/CSSImportRule.cpp b/Source/core/css/CSSImportRule.cpp
index 8e552f0b8cbde54b7ec89a31307dbf5e755532ce..cf733f70f3c4bf913a9d2bc5fafec498ea05f083 100644
--- a/Source/core/css/CSSImportRule.cpp
+++ b/Source/core/css/CSSImportRule.cpp
@@ -71,18 +71,18 @@ String CSSImportRule::cssText() const
         }
     }
     result.append(';');
-    
+
     return result.toString();
 }
 
 CSSStyleSheet* CSSImportRule::styleSheet() const
-{ 
+{
     if (!m_importRule->styleSheet())
         return 0;
 
     if (!m_styleSheetCSSOMWrapper)
         m_styleSheetCSSOMWrapper = CSSStyleSheet::create(m_importRule->styleSheet(), const_cast<CSSImportRule*>(this));
-    return m_styleSheetCSSOMWrapper.get(); 
+    return m_styleSheetCSSOMWrapper.get();
 }
 
 void CSSImportRule::reattach(StyleRuleBase*)