tree and list remove getAriaRole since VoiceOver only properly works for tree...

tree and list remove getAriaRole since VoiceOver only properly works for tree / treeitem combination

src/vs/base/browser/ui/list/listWidget.ts

@@ -187,16 +187,14 @@ class Trait<T> implements ISpliceable<boolean>, IDisposable {
 class FocusTrait<T> extends Trait<T> {
 
 	constructor(
-		private getDomId: IIdentityProvider<number>,
-		private ariaRole: string
+		private getDomId: IIdentityProvider<number>
 	) {
 		super('focused');
 	}
 
 	renderIndex(index: number, container: HTMLElement): void {
 		super.renderIndex(index, container);
-
-		container.setAttribute('role', this.ariaRole || 'treeitem');
+		container.setAttribute('role', 'treeitem');
 		container.setAttribute('id', this.getDomId(index));
 
 		if (this.contains(index)) {
@@ -674,7 +672,6 @@ export class DefaultStyleController implements IStyleController {
 export interface IListOptions<T> extends IListViewOptions, IListStyles {
 	identityProvider?: IIdentityProvider<T>;
 	ariaLabel?: string;
-	ariaRole?: string;
 	mouseSupport?: boolean;
 	selectOnMouseDown?: boolean;
 	focusOnMouseDown?: boolean;
@@ -903,7 +900,7 @@ export class List<T> implements ISpliceable<T>, IDisposable {
 		renderers: IRenderer<T, any>[],
 		options: IListOptions<T> = DefaultOptions
 	) {
-		this.focus = new FocusTrait(i => this.getElementDomId(i), options.ariaRole);
+		this.focus = new FocusTrait(i => this.getElementDomId(i));
 		this.selection = new Trait('selected');
 
 		mixin(options, defaultStyles, false);

src/vs/base/parts/quickopen/browser/quickOpenViewer.ts

@@ -56,10 +56,6 @@ export class AccessibilityProvider implements IAccessibilityProvider {
 		return model.accessibilityProvider && model.accessibilityProvider.getAriaLabel(element);
 	}
 
-	public getAriaRole(tree: ITree, element: any): string {
-		return 'listitem';
-	}
-
 	getPosInSet(tree: ITree, element: any): string {
 		const model = this.modelProvider.getModel();
 		let i = 0;
@@ -144,4 +140,4 @@ export class Renderer implements IRenderer {
 		const model = this.modelProvider.getModel();
 		model.renderer.disposeTemplate(templateId, templateData);
 	}
-}
+}
\ No newline at end of file

src/vs/base/parts/tree/browser/tree.ts

@@ -446,13 +446,6 @@ export interface IAccessibilityProvider {
 	 */
 	getAriaLabel(tree: ITree, element: any): string;
 
-	/**
-	 * Given an element in the tree, return the ARIA role that should be associated with the
-	 * item. This helps screen readers to provide a meaningful role for the currently focused
-	 * tree element.
-	 */
-	getAriaRole(tree: ITree, element: any): string;
-
 	/**
 	 * Given an element in the tree return its aria-posinset. Should be between 1 and aria-setsize
 	 * https://www.w3.org/TR/wai-aria/states_and_properties#aria-posinset

src/vs/base/parts/tree/browser/treeDefaults.ts

@@ -467,10 +467,6 @@ export class DefaultAccessibilityProvider implements _.IAccessibilityProvider {
 	getAriaLabel(tree: _.ITree, element: any): string {
 		return null;
 	}
-
-	getAriaRole(tree: _.ITree, element: any): string {
-		return null;
-	}
 }
 
 export class DefaultTreestyler implements _.ITreeStyler {

src/vs/base/parts/tree/browser/treeView.ts

@@ -208,17 +208,12 @@ export class ViewItem implements IViewItem {
 		this.element.style.height = this.height + 'px';
 
 		// ARIA
+		this.element.setAttribute('role', 'treeitem');
 		const accessibility = this.context.accessibilityProvider;
 		const ariaLabel = accessibility.getAriaLabel(this.context.tree, this.model.getElement());
 		if (ariaLabel) {
 			this.element.setAttribute('aria-label', ariaLabel);
 		}
-
-		const ariaRole = accessibility.getAriaRole(this.context.tree, this.model.getElement());
-		if (ariaRole) {
-			this.element.setAttribute('role', ariaRole);
-		}
-
 		if (accessibility.getPosInSet && accessibility.getSetSize) {
 			this.element.setAttribute('aria-setsize', accessibility.getSetSize());
 			this.element.setAttribute('aria-posinset', accessibility.getPosInSet(this.context.tree, this.model.getElement()));

src/vs/editor/contrib/referenceSearch/referencesWidget.ts

@@ -422,10 +422,6 @@ class AriaProvider implements tree.IAccessibilityProvider {
 			return undefined;
 		}
 	}
-
-	public getAriaRole(tree: tree.ITree, element: any): string {
-		return 'treeitem';
-	}
 }
 
 class VSash {

src/vs/workbench/parts/debug/browser/breakpointsView.ts

@@ -79,8 +79,7 @@ export class BreakpointsView extends ViewletPanel {
 			new FunctionBreakpointInputRenderer(this.debugService, this.contextViewService, this.themeService)
 		], {
 				identityProvider: element => element.getId(),
-				multipleSelectionSupport: false,
-				ariaRole: 'checkbox'
+				multipleSelectionSupport: false
 			}) as WorkbenchList<IEnablement>;
 
 		CONTEXT_BREAKPOINTS_FOCUSED.bindTo(this.list.contextKeyService);

src/vs/workbench/parts/debug/browser/loadedScriptsView.ts

@@ -592,8 +592,4 @@ class LoadedSciptsAccessibilityProvider implements IAccessibilityProvider {
 		}
 		return null;
 	}
-
-	public getAriaRole(tree: ITree, element: any): string {
-		return 'treeitem';
-	}
 }

src/vs/workbench/parts/debug/electron-browser/callStackView.ts

@@ -556,8 +556,4 @@ class CallstackAccessibilityProvider implements IAccessibilityProvider {
 
 		return null;
 	}
-
-	public getAriaRole(tree: ITree, element: any): string {
-		return 'treeitem';
-	}
 }

src/vs/workbench/parts/debug/electron-browser/replViewer.ts

@@ -312,10 +312,6 @@ export class ReplExpressionsAccessibilityProvider implements IAccessibilityProvi
 
 		return null;
 	}
-
-	public getAriaRole(tree: ITree, element: any): string {
-		return 'treeitem';
-	}
 }
 
 export class ReplExpressionsActionProvider implements IActionProvider {

src/vs/workbench/parts/debug/electron-browser/variablesView.ts

@@ -310,10 +310,6 @@ class VariablesAccessibilityProvider implements IAccessibilityProvider {
 
 		return null;
 	}
-
-	public getAriaRole(tree: ITree, element: any): string {
-		return 'treeitem';
-	}
 }
 
 class VariablesController extends BaseDebugController {

src/vs/workbench/parts/debug/electron-browser/watchExpressionsView.ts

@@ -334,10 +334,6 @@ class WatchExpressionsAccessibilityProvider implements IAccessibilityProvider {
 
 		return null;
 	}
-
-	public getAriaRole(tree: ITree, element: any): string {
-		return 'treeitem';
-	}
 }
 
 class WatchExpressionsController extends BaseDebugController {

src/vs/workbench/parts/files/electron-browser/views/explorerViewer.ts

@@ -391,10 +391,6 @@ export class FileAccessibilityProvider implements IAccessibilityProvider {
 	public getAriaLabel(tree: ITree, stat: ExplorerItem): string {
 		return stat.name;
 	}
-
-	public getAriaRole(tree: ITree, element: any): string {
-		return 'treeitem';
-	}
 }
 
 // Explorer Controller

src/vs/workbench/parts/markers/electron-browser/markersTreeViewer.ts

@@ -311,8 +311,4 @@ export class MarkersTreeAccessibilityProvider implements IAccessibilityProvider
 		}
 		return null;
 	}
-
-	public getAriaRole(tree: ITree, element: any): string {
-		return 'treeitem';
-	}
 }

src/vs/workbench/parts/preferences/browser/settingsTree.ts

@@ -1396,10 +1396,6 @@ export class SettingsAccessibilityProvider implements IAccessibilityProvider {
 
 		return '';
 	}
-
-	public getAriaRole(tree: ITree, element: any): string {
-		return 'treeitem';
-	}
 }
 
 class NonExpandableOrSelectableTree extends Tree {
@@ -1618,4 +1614,4 @@ class CopySettingAsJSONAction extends Action {
 
 		return TPromise.as(null);
 	}
-}
+}
\ No newline at end of file

src/vs/workbench/parts/search/browser/searchResultsView.ts

@@ -361,10 +361,6 @@ export class SearchAccessibilityProvider implements IAccessibilityProvider {
 		}
 		return undefined;
 	}
-
-	public getAriaRole(tree: ITree, element: any): string {
-		return 'treeitem';
-	}
 }
 
 export class SearchFilter implements IFilter {