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

Source/core/html/HTMLBodyElement.h

Index: Source/core/html/HTMLBodyElement.h
diff --git a/Source/core/html/HTMLBodyElement.h b/Source/core/html/HTMLBodyElement.h
index a5941f750ea5583259acda11c0924486391c1e7f..961f90f3661f07e0bfc7cb8f6676b2c8629536f1 100644
--- a/Source/core/html/HTMLBodyElement.h
+++ b/Source/core/html/HTMLBodyElement.h
@@ -76,20 +76,20 @@ private:
 
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
     virtual void didNotifySubtreeInsertions(ContainerNode*) OVERRIDE;
-    
+
     virtual bool isURLAttribute(const Attribute&) const OVERRIDE;
-    
+
     virtual bool supportsFocus() const;
 
     virtual int scrollLeft();
     virtual void setScrollLeft(int scrollLeft);
-    
+
     virtual int scrollTop();
     virtual void setScrollTop(int scrollTop);
-    
+
     virtual int scrollHeight();
     virtual int scrollWidth();
-    
+
     virtual void addSubresourceAttributeURLs(ListHashSet<KURL>&) const;
 };