Bug 15604 Promote Fill arguments on method completion to a real preference
It is still in work in progress but it has become an established feature by now. Promote the preference to the code assist preference page.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/PreferencesConstants.java
* Enable / Disable the usage of bold style for javadoc links.
	 */
	public final static String EDITOR_JAVADOC_LINKS_BOLD= IJavaColorConstants.JAVADOC_LINK + JavaEditorPreferencePage.BOLD;
		
	/**
	 * Color used for javadoc default text. RGB color encoded using PreferenceConverter.
	 * @see org.eclipse.jface.resource.StringConverter
	 * @see org.eclipse.jface.preference.PreferenceConverter
	 */
	public final static String EDITOR_JAVADOC_DEFAULT_COLOR= IJavaColorConstants.JAVADOC_DEFAULT;
	/**
	 * Enable / Disable the usage of bold style for javadoc default text.
	 */
	public final static String EDITOR_JAVADOC_DEFAULT_BOLD= IJavaColorConstants.JAVADOC_DEFAULT + JavaEditorPreferencePage.BOLD;
	/**
	 * Enable / Disable the auto activation of the Java code assist. Boolean value.
	 */
	public final static String CODEASSIST_AUTOACTIVATION= ContentAssistPreference.AUTOACTIVATION;
	/**
	 * Specifies the auto activation delay time. Int value.
	 */
	public final static String CODEASSIST_AUTOACTIVATION_DELAY= ContentAssistPreference.AUTOACTIVATION_DELAY;
	/**
	 * Show only visible elements as code assist proposals. Boolean value.
	 */
	public final static String CODEASSIST_SHOW_VISIBLE_PROPOSALS= ContentAssistPreference.SHOW_VISIBLE_PROPOSALS;
	/**
	 * Enable / Disable case sensitivity for filtering code assist proposals. Boolean value.
	 */
	public final static String CODEASSIST_CASE_SENSITIVITY= ContentAssistPreference.CASE_SENSITIVITY;