Removed externalRequest code from CRWWebController.

ios/chrome/browser/web/window_open_by_dom_egtest.mm

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import <EarlGrey/EarlGrey.h>
 
 #import "base/test/ios/wait_util.h"
 #include "components/content_settings/core/common/content_settings.h"
 #include "ios/chrome/test/app/settings_test_util.h"
 #import "ios/chrome/test/app/tab_test_util.h"
@@ skipping 42 matching lines @@
   AssertMainTabCount(1);
 }
 
 // Tests that opening a link with target=_blank which then immediately closes
 // itself works.
 - (void)testLinkWithBlankTargetWithImmediateClose {
   TapWebViewElementWithId("webScenarioWindowOpenBlankTargetWithImmediateClose");
   AssertMainTabCount(1);
 }
 
-// Tests that |sessionStorage| content is available for windows opened by DOM
-// via |target="_blank"| links.
-// TODO(crbug.com/681434): Enable this test.
-- (void)DISABLED_testLinkWithBlankTargetSessionStorage {
+// Tests that sessionStorage content is available for windows opened by DOM via
+// target="_blank" links.
+- (void)testLinkWithBlankTargetSessionStorage {
   using chrome_test_util::ExecuteJavaScript;
 
   NSError* error = nil;
   ExecuteJavaScript(@"sessionStorage.setItem('key', 'value');", &error);
   GREYAssert(!error, @"Error during script execution: %@", error);
 
   TapWebViewElementWithId("webScenarioWindowOpenSamePageWithBlankTarget");
   AssertMainTabCount(2);
   [[EarlGrey selectElementWithMatcher:WebViewContainingText("Expected result")]
       assertWithMatcher:grey_notNil()];
@@ skipping 106 matching lines @@
       assertWithMatcher:grey_notNil()];
 }
 
 // Tests that closing the current window using DOM fails.
 - (void)testCloseWindowNotOpenByDOM {
   TapWebViewElementWithId("webScenarioWindowClose");
   AssertMainTabCount(1);
 }
 
 @end