Remove configurability for whether noreferrer implies noopener

RELNOTES[INC]: Remove configurability for whether window.open with noreferrer implies noopener

PiperOrigin-RevId: 467259786
Change-Id: Ic07e344977d642a67283e6da7c0255fecbf0c86e

closure/goog/window/window.js

@@ -54,27 +54,6 @@ goog.window.createFakeWindow_ = function() {
   return /** @type {!Window} */ ({});
 };
 
-/**
- * @define {boolean} Whether setting 'noreferrer' implies 'noopener'. Ultimately
- *     we aim to make this true by default.
- */
-goog.window.NOREFERRER_IMPLIES_NOOPENER =
-    goog.define('goog.window.NOREFERRER_IMPLIES_NOOPENER', true);
-
-/**
- * @const forTesting contains a map used for overriding goog.defines for
- * testing purposes.
- */
-goog.window.forTesting = {};
-
-/**
- * @type {boolean} An overridable copy of
- *     goog.window.NOREFERRER_IMPLIES_NOOPENER.
- */
-goog.window.forTesting.noreferrerImpliesNoopener =
-    goog.window.NOREFERRER_IMPLIES_NOOPENER;
-
-
 /**
  * Opens a new window.
  *
@@ -315,8 +294,7 @@ goog.window.open = function(linkRef, opt_options, opt_parentWin) {
     // we're already running on a modern enough browser that the referrer is
     // hidden by default. But setting noreferrer implies noopener too, so we
     // also have to clear the opener here.
-    if (goog.window.forTesting.noreferrerImpliesNoopener && newWin &&
-        opt_options['noreferrer']) {
+    if (newWin && opt_options['noreferrer']) {
       newWin.opener = null;
     }
   }

closure/goog/window/window_test.js

@@ -144,7 +144,6 @@ testSuite({
 
   setUp() {
     newWin = null;
-    googWindow.forTesting.noreferrerImpliesNoopener = true;
   },
 
   tearDown() {
@@ -516,39 +515,4 @@ testSuite({
       assertEquals('', openedUrl);
     }
   },
-
-
-  testOpenNewWindowNoreferrerImpliesNoopenerDisabled() {
-    googWindow.forTesting.noreferrerImpliesNoopener = false;
-
-    let documentWriteHtml;
-    let openedUrl;
-    const mockNewWin = {};
-    mockNewWin.document = {
-      write: function(html) {
-        documentWriteHtml = html;
-      },
-      close: function() {},
-    };
-    const /** ? */ mockWin = {
-      open: function(url) {
-        openedUrl = url;
-        return mockNewWin;
-      },
-    };
-    mockNewWin.opener = mockWin;
-    const options = {noreferrer: true};
-    const win = googWindow.open('https://example.com', options, mockWin);
-    if (self.crossOriginIsolated !== undefined) {
-      assertEquals(undefined, documentWriteHtml);
-      assertEquals('https://example.com', openedUrl);
-      assertNotNull(win.opener);
-    } else {
-      assertEquals(
-          '<meta name="referrer" content="no-referrer"><meta http-equiv="refresh" content="0; url=https://example.com">',
-          documentWriteHtml);
-      assertEquals('', openedUrl);
-      assertNull(win.opener);
-    }
-  },
 });