Bug 163360 [Field Assist] - API - Provide ControlDecoration constructor without specifying decoration
Currently you can only create a ControlDecoration by specifying the control and the decoration in the constructor. This works nicely when the decoration is static (ie, always content assist). But there are use cases where the decoration changes depending on the state of the field, and at creation time, it's not clear which decoration will be set. Having a constructor that doesn't require a decoration would be nice.
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ControlDecoration.java
private static final String EMPTY = ""; 
		/**
		 * Offset of info hover arrow from the left or right side.
		 */
		private int hao = 10;
		/**
		 * Width of info hover arrow.
		 */
		private int haw = 8;
		/**
		 * Height of info hover arrow.
		 */
		private int hah = 10;
		/**
		 * Margin around info hover text.
		 */
		private int hm = 2;
		/**
		 * This info hover's shell.
		 */
		Shell hoverShell;
		/**
		 * The info hover text.
		 */
		String text = EMPTY;