Merge VS Code 1.21 source code (#1067)

* Initial VS Code 1.21 file copy with patches

* A few more merges

* Post npm install

* Fix batch of build breaks

* Fix more build breaks

* Fix more build errors

* Fix more build breaks

* Runtime fixes 1

* Get connection dialog working with some todos

* Fix a few packaging issues

* Copy several node_modules to package build to fix loader issues

* Fix breaks from master

* A few more fixes

* Make tests pass

* First pass of license header updates

* Second pass of license header updates

* Fix restore dialog issues

* Remove add additional themes menu items

* fix select box issues where the list doesn't show up

* formatting

* Fix editor dispose issue

* Copy over node modules to correct location on all platforms

src/vs/platform/extensionManagement/node/extensionsManifestCache.ts

@@ -0,0 +1,42 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+'use strict';
+
+import { Disposable } from 'vs/base/common/lifecycle';
+import { join } from 'path';
+import { IEnvironmentService } from 'vs/platform/environment/common/environment';
+import { IExtensionManagementService, DidInstallExtensionEvent, DidUninstallExtensionEvent } from 'vs/platform/extensionManagement/common/extensionManagement';
+import { MANIFEST_CACHE_FOLDER, USER_MANIFEST_CACHE_FILE } from 'vs/platform/extensions/common/extensions';
+import * as pfs from 'vs/base/node/pfs';
+
+export class ExtensionsManifestCache extends Disposable {
+
+	private extensionsManifestCache = join(this.environmentService.userDataPath, MANIFEST_CACHE_FOLDER, USER_MANIFEST_CACHE_FILE);
+
+	constructor(
+		private readonly environmentService: IEnvironmentService,
+		extensionsManagementServuce: IExtensionManagementService
+	) {
+		super();
+		this._register(extensionsManagementServuce.onDidInstallExtension(e => this.onDidInstallExtension(e)));
+		this._register(extensionsManagementServuce.onDidUninstallExtension(e => this.onDidUnInstallExtension(e)));
+	}
+
+	private onDidInstallExtension(e: DidInstallExtensionEvent): void {
+		if (!e.error) {
+			this.invalidate();
+		}
+	}
+
+	private onDidUnInstallExtension(e: DidUninstallExtensionEvent): void {
+		if (!e.error) {
+			this.invalidate();
+		}
+	}
+
+	invalidate(): void {
+		pfs.del(this.extensionsManifestCache).done(() => { }, () => { });
+	}
+}