clear output as a global workbench action

fixes #10989

src/vs/workbench/parts/output/browser/output.contribution.ts

@@ -14,7 +14,7 @@ import {KeybindingsRegistry} from 'vs/platform/keybinding/common/keybindingsRegi
 import {registerSingleton} from 'vs/platform/instantiation/common/extensions';
 import {IWorkbenchActionRegistry, Extensions as ActionExtensions} from 'vs/workbench/common/actionRegistry';
 import {OutputService} from 'vs/workbench/parts/output/browser/outputServices';
-import {ToggleOutputAction} from 'vs/workbench/parts/output/browser/outputActions';
+import {ToggleOutputAction, ClearOutputAction} from 'vs/workbench/parts/output/browser/outputActions';
 import {OUTPUT_MIME, OUTPUT_MODE_ID, OUTPUT_PANEL_ID, IOutputService} from 'vs/workbench/parts/output/common/output';
 import panel = require('vs/workbench/browser/panel');
 import {EditorContextKeys} from 'vs/editor/common/editorCommon';
@@ -52,6 +52,8 @@ actionRegistry.registerWorkbenchAction(new SyncActionDescriptor(ToggleOutputActi
 	}
 }), 'View: Toggle Output', nls.localize('viewCategory', "View"));
 
+actionRegistry.registerWorkbenchAction(new SyncActionDescriptor(ClearOutputAction, ClearOutputAction.ID, ClearOutputAction.LABEL),
+	'View: Clear Output', nls.localize('viewCategory', "View"));
 
 interface IActionDescriptor {
 	id: string;

src/vs/workbench/parts/output/browser/outputActions.ts

@@ -41,11 +41,15 @@ export class ToggleOutputAction extends Action {
 
 export class ClearOutputAction extends Action {
 
+	public static ID = 'workbench.output.action.clearOutput';
+	public static LABEL = nls.localize('clearOutput', "Clear Output");
+
 	constructor(
+		id: string, label: string,
 		@IOutputService private outputService: IOutputService,
 		@IPanelService private panelService: IPanelService
 	) {
-		super('workbench.output.action.clearOutput', nls.localize('clearOutput', "Clear Output"), 'output-action clear-output');
+		super(id, label, 'output-action clear-output');
 	}
 
 	public run(): TPromise<any> {

src/vs/workbench/parts/output/browser/outputPanel.ts

@@ -55,7 +55,7 @@ export class OutputPanel extends StringEditor {
 		if (!this.actions) {
 			this.actions = [
 				this.instantiationService.createInstance(SwitchOutputAction),
-				this.instantiationService.createInstance(ClearOutputAction)
+				this.instantiationService.createInstance(ClearOutputAction, ClearOutputAction.ID, ClearOutputAction.LABEL)
 			];
 
 			this.actions.forEach(a => {