diff --git a/src/vs/base/common/accessibility.ts b/src/vs/base/common/accessibility.ts
deleted file mode 100644
index 4b2322da9c288491d0b620f4e0f03deed1258292..0000000000000000000000000000000000000000
--- a/src/vs/base/common/accessibility.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-/*---------------------------------------------------------------------------------------------
- *  Copyright (c) Microsoft Corporation. All rights reserved.
- *  Licensed under the MIT License. See License.txt in the project root for license information.
- *--------------------------------------------------------------------------------------------*/
-
-export interface AccessibilityInformation {
-	label: string;
-	role?: string;
-}
diff --git a/src/vs/platform/accessibility/common/accessibility.ts b/src/vs/platform/accessibility/common/accessibility.ts
index 3a025be247a59d618033b999cd52b71b0fb01381..65fcf4abaf6995821b18dba9d3d15987146a0c07 100644
--- a/src/vs/platform/accessibility/common/accessibility.ts
+++ b/src/vs/platform/accessibility/common/accessibility.ts
@@ -32,3 +32,8 @@ export const enum AccessibilitySupport {
 }
 
 export const CONTEXT_ACCESSIBILITY_MODE_ENABLED = new RawContextKey<boolean>('accessibilityModeEnabled', false);
+
+export interface IAccessibilityInformation {
+	label: string;
+	role?: string;
+}
diff --git a/src/vs/workbench/api/browser/mainThreadStatusBar.ts b/src/vs/workbench/api/browser/mainThreadStatusBar.ts
index 46feba4475be675a101239d4070c84c4ec9acac4..33e5b948c9f386269aa144aca3eb3ff1e918a00d 100644
--- a/src/vs/workbench/api/browser/mainThreadStatusBar.ts
+++ b/src/vs/workbench/api/browser/mainThreadStatusBar.ts
@@ -9,7 +9,7 @@ import { ThemeColor } from 'vs/platform/theme/common/themeService';
 import { extHostNamedCustomer } from 'vs/workbench/api/common/extHostCustomers';
 import { dispose } from 'vs/base/common/lifecycle';
 import { Command } from 'vs/editor/common/modes';
-import { AccessibilityInformation } from 'vs/base/common/accessibility';
+import { IAccessibilityInformation } from 'vs/platform/accessibility/common/accessibility';
 
 @extHostNamedCustomer(MainContext.MainThreadStatusBar)
 export class MainThreadStatusBar implements MainThreadStatusBarShape {
@@ -26,7 +26,7 @@ export class MainThreadStatusBar implements MainThreadStatusBarShape {
 		this.entries.clear();
 	}
 
-	$setEntry(id: number, statusId: string, statusName: string, text: string, tooltip: string | undefined, command: Command | undefined, color: string | ThemeColor | undefined, alignment: MainThreadStatusBarAlignment, priority: number | undefined, accessibilityInformation: AccessibilityInformation): void {
+	$setEntry(id: number, statusId: string, statusName: string, text: string, tooltip: string | undefined, command: Command | undefined, color: string | ThemeColor | undefined, alignment: MainThreadStatusBarAlignment, priority: number | undefined, accessibilityInformation: IAccessibilityInformation): void {
 		// if there are icons in the text use the tooltip for the aria label
 		let ariaLabel: string;
 		if (accessibilityInformation) {
diff --git a/src/vs/workbench/api/common/extHost.protocol.ts b/src/vs/workbench/api/common/extHost.protocol.ts
index bd821f097a192c7aa27cc8f65ab3c7fa276396b9..0dd2ec1b545093f0d0df2009cd72f26c4095b090 100644
--- a/src/vs/workbench/api/common/extHost.protocol.ts
+++ b/src/vs/workbench/api/common/extHost.protocol.ts
@@ -56,7 +56,7 @@ import { CallHierarchyItem } from 'vs/workbench/contrib/callHierarchy/common/cal
 import { Dto } from 'vs/base/common/types';
 import { ISerializableEnvironmentVariableCollection } from 'vs/workbench/contrib/terminal/common/environmentVariable';
 import { DebugConfigurationProviderTriggerKind } from 'vs/workbench/api/common/extHostTypes';
-import { AccessibilityInformation } from 'vs/base/common/accessibility';
+import { IAccessibilityInformation } from 'vs/platform/accessibility/common/accessibility';
 
 export interface IEnvironment {
 	isExtensionDevelopmentDebug: boolean;
@@ -546,7 +546,7 @@ export interface MainThreadQuickOpenShape extends IDisposable {
 }
 
 export interface MainThreadStatusBarShape extends IDisposable {
-	$setEntry(id: number, statusId: string, statusName: string, text: string, tooltip: string | undefined, command: ICommandDto | undefined, color: string | ThemeColor | undefined, alignment: statusbar.StatusbarAlignment, priority: number | undefined, accessibilityInformation: AccessibilityInformation | undefined): void;
+	$setEntry(id: number, statusId: string, statusName: string, text: string, tooltip: string | undefined, command: ICommandDto | undefined, color: string | ThemeColor | undefined, alignment: statusbar.StatusbarAlignment, priority: number | undefined, accessibilityInformation: IAccessibilityInformation | undefined): void;
 	$dispose(id: number): void;
 }
 
diff --git a/src/vs/workbench/common/views.ts b/src/vs/workbench/common/views.ts
index a73ce8f34f61200a4db4e0ae7efc6814e0092a4e..7ed78a972f589486fd858d0fa7f29e17c39130f0 100644
--- a/src/vs/workbench/common/views.ts
+++ b/src/vs/workbench/common/views.ts
@@ -22,7 +22,7 @@ import { SetMap } from 'vs/base/common/collections';
 import { IProgressIndicator } from 'vs/platform/progress/common/progress';
 import Severity from 'vs/base/common/severity';
 import { IPaneComposite } from 'vs/workbench/common/panecomposite';
-import { AccessibilityInformation } from 'vs/base/common/accessibility';
+import { IAccessibilityInformation } from 'vs/platform/accessibility/common/accessibility';
 
 export const TEST_VIEW_CONTAINER_ID = 'workbench.view.extension.test';
 
@@ -636,7 +636,7 @@ export interface ITreeItem {
 
 	children?: ITreeItem[];
 
-	accessibilityInformation?: AccessibilityInformation;
+	accessibilityInformation?: IAccessibilityInformation;
 }
 
 export interface ITreeViewDataProvider {
diff --git a/src/vs/workbench/contrib/timeline/common/timeline.ts b/src/vs/workbench/contrib/timeline/common/timeline.ts
index 09a40ad3432f841d6ad66fcf6b752ec9e14450ac..c63e6ad52a108390aaa8b923fe72e43dd0f48bbb 100644
--- a/src/vs/workbench/contrib/timeline/common/timeline.ts
+++ b/src/vs/workbench/contrib/timeline/common/timeline.ts
@@ -10,7 +10,7 @@ import { URI } from 'vs/base/common/uri';
 import { Command } from 'vs/editor/common/modes';
 import { ExtensionIdentifier } from 'vs/platform/extensions/common/extensions';
 import { createDecorator } from 'vs/platform/instantiation/common/instantiation';
-import { AccessibilityInformation } from 'vs/base/common/accessibility';
+import { IAccessibilityInformation } from 'vs/platform/accessibility/common/accessibility';
 
 export function toKey(extension: ExtensionIdentifier | string, source: string) {
 	return `${typeof extension === 'string' ? extension : ExtensionIdentifier.toKey(extension)}|${source}`;
@@ -25,7 +25,7 @@ export interface TimelineItem {
 	id?: string;
 	timestamp: number;
 	label: string;
-	accessibilityInformation?: AccessibilityInformation;
+	accessibilityInformation?: IAccessibilityInformation;
 	icon?: URI,
 	iconDark?: URI,
 	themeIcon?: { id: string },