Revert "Workaround crash that can happen in Electron/Chromium"

This reverts commit 2ca0ccbe0c.

src/browser/renderer/dom/StyleSheet.ts

@@ -3,8 +3,6 @@
  * @license MIT
  */
 
-import { isElectron } from 'common/Platform';
-
 export interface IStyleSheet {
   dispose: () => void;
   setCss: (value: string) => void;
@@ -39,12 +37,9 @@ const createStyleElement = (parent: HTMLElement): IStyleSheet => {
 };
 
 export const createStyle = (parent: HTMLElement): IStyleSheet => {
-  // The combination of the CSP workaround and the DOM renderer can trigger a crash in electron
-  // https://github.com/microsoft/vscode/issues/189753
-  if (!isElectron) {
-    try {
-      return createCssStyleSheet(parent.ownerDocument);
-    } catch { /* Fall through */ }
+  try {
+    return createCssStyleSheet(parent.ownerDocument);
+  } catch {
+    return createStyleElement(parent);
   }
-  return createStyleElement(parent);
 };

src/common/Platform.ts

@@ -17,7 +17,6 @@ export const isNode = (typeof navigator === 'undefined') ? true : false;
 const userAgent = (isNode) ? 'node' : navigator.userAgent;
 const platform = (isNode) ? 'node' : navigator.platform;
 
-export const isElectron = userAgent.includes('Electron');
 export const isFirefox = userAgent.includes('Firefox');
 export const isLegacyEdge = userAgent.includes('Edge');
 export const isSafari = /^((?!chrome|android).)*safari/i.test(userAgent);