Bug 63267 [RCP] tab style for M9
the tab style in the IDE in M9 should use the curved style
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/IDEWorkbenchAdvisor.java
if ((flags & FILL_PROXY) != 0) {
			
			if ((flags & FILL_MENU_BAR) != 0) {
				actionBuilder.populateMenuBar(actionConfigurer);
			}
			if ((flags & FILL_COOL_BAR) != 0) {
				actionBuilder.populateCoolBar(actionConfigurer);
			}
		} else {
			
			
			windowConfigurer.setData(ACTION_BUILDER,actionBuilder);
			actionBuilder.makeAndPopulateActions(getWorkbenchConfigurer(), actionConfigurer);
		}
		
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.ui.application.WorkbenchAdvisor#getMainPreferencePageId
	 */
	public String getMainPreferencePageId() {
		
		return WORKBENCH_PREFERENCE_CATEGORY_ID;
	}
    /**
     * Tries to open the intro,if one exists and otherwise will open the legacy 
     * Welcome pages.
     * 
     * @see org.eclipse.ui.application.WorkbenchAdvisor#openIntro(org.eclipse.ui.application.IWorkbenchWindowConfigurer)