Open URL in new tab instead of new window to fix the URL flow.

RELNOTES: Introduces a workaround for window.open(..., 'noopener') which will cause the the URL to open in a new browser window with no bookmark bar or ability to add tabs. This is a known issue tracked here: whatwg/html#1902

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=172163219

closure/goog/window/window.js

@@ -128,6 +128,7 @@ goog.window.open = function(linkRef, opt_options, opt_parentWin) {
         sb.push(option + '=' + opt_options[option]);
         break;
       case 'target':
+      case 'noopener':
       case 'noreferrer':
         break;
       default:
@@ -224,6 +225,12 @@ goog.window.open = function(linkRef, opt_options, opt_parentWin) {
   } else {
     newWin = parentWin.open(
         goog.html.SafeUrl.unwrap(safeLinkRef), target, optionString);
+    // Passing in 'noopener' into the 'windowFeatures' param of window.open(...)
+    // will yield a feature-deprived browser. This is an known issue, tracked
+    // here: https://github.com/whatwg/html/issues/1902
+    if (opt_options['noopener']) {
+      newWin.opener = null;
+    }
   }
   // newWin is null if a popup blocker prevented the window open.
   return newWin;

closure/goog/window/window_test.js

@@ -382,3 +382,17 @@ function testOpenNoReferrerEscapesUrl() {
       'Does not contain expected HTML-escaped string: ' + documentWriteHtml,
       /hello&world/, documentWriteHtml);
 }
+
+function testOpenNewWindowNoopener() {
+  newWin = goog.window.open(
+      REDIRECT_URL_PREFIX + 'theBest', {'target': '_blank', 'noopener': true});
+
+  // This mode cannot return a new window.
+  assertNotNull(newWin);
+  assertNotEquals(undefined, newWin.document);
+  assertNull(newWin.opener);
+
+  return waitForTestWindow(newWin).then(function(win) {
+    verifyWindow(win, false, 'theBest');
+  });
+}