Use SameDocument instead of SamePage term on iOS.

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 51 matching lines @@
 
 // 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");
+  TapWebViewElementWithId("webScenarioWindowOpenSameURLWithBlankTarget");
   AssertMainTabCount(2);
   [[EarlGrey selectElementWithMatcher:WebViewContainingText("Expected result")]
       assertWithMatcher:grey_notNil()];
 
   id value = ExecuteJavaScript(@"sessionStorage.getItem('key');", &error);
   GREYAssert(!error, @"Error during script execution: %@", error);
   GREYAssert([value isEqual:@"value"], @"sessionStorage is not shared");
 }
 
 // Tests a link with target="_blank".
@@ skipping 99 matching lines @@
       assertWithMatcher:grey_notNil()];
 }
 
 // Tests that closing the current window using DOM fails.
 - (void)testCloseWindowNotOpenByDOM {
   TapWebViewElementWithId("webScenarioWindowClose");
   AssertMainTabCount(1);
 }
 
 @end