Bug 318944 CSSSWTEngineImpl leaks memory
CSSSWTEngineImpl stores too many element contexts. In a memory snapshot, the HashMap size was 15559. This is most probably a leak.
bundles/org.eclipse.e4.ui.css.core/src/org/eclipse/e4/ui/css/core/impl/engine/AbstractCSSEngine.java
return style;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.e4.ui.core.css.engine.CSSEngine#parseAndApplyStyleDeclaration(org.w3c.css.sac.InputSource,
	 *      java.lang.Object)
	 */
	public CSSStyleDeclaration parseAndApplyStyleDeclaration(Object node,
			InputSource source) throws IOException {
		CSSStyleDeclaration style = parseStyleDeclaration(source);
		this.applyStyleDeclaration(node, style, null);
		return style;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.e4.ui.core.css.engine.CSSEngine#parseAndApplyStyleDeclaration(java.lang.Object,
	 *      java.lang.String)
	 */
	public CSSStyleDeclaration parseAndApplyStyleDeclaration(Object node,
			String style) throws IOException {
		CSSStyleDeclaration styleDeclaration = parseStyleDeclaration(style);
		this.applyStyleDeclaration(node, styleDeclaration, null);
		return styleDeclaration;
	}
	
	/*
	 * (non-Javadoc)
	 *