[ObjC ARC] Converts ios/chrome/browser/ui/ntp:ntp_controller to ARC.

ios/chrome/browser/ui/ntp/new_tab_page_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 <XCTest/XCTest.h>
 
 #include "components/strings/grit/components_strings.h"
 #import "ios/chrome/browser/ui/commands/generic_chrome_command.h"
 #include "ios/chrome/browser/ui/commands/ios_command_ids.h"
 #import "ios/chrome/browser/ui/ntp/new_tab_page_controller.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/chrome/test/app/chrome_test_util.h"
 #import "ios/chrome/test/app/tab_test_util.h"
 #import "ios/chrome/test/earl_grey/accessibility_util.h"
 #import "ios/chrome/test/earl_grey/chrome_matchers.h"
 #import "ios/chrome/test/earl_grey/chrome_test_case.h"
 #import "ios/testing/wait_util.h"
 #include "ui/base/l10n/l10n_util.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
-@implementation NewTabPageController (ExposedForTesting)
-- (GoogleLandingViewController*)googleLandingController {
-  return googleLandingController_;
-}
-@end
-
 @interface GoogleLandingViewController (ExposedForTesting)
 - (BOOL)scrolledToTop;
 - (BOOL)animateHeader;
 @end
 
 namespace {
 
 void DismissNewTabPagePanel() {
   if (!IsIPadIdiom()) {
     id<GREYMatcher> matcher = grey_allOf(grey_accessibilityID(@"Exit"),
@@ skipping 262 matching lines @@
   AssertNTPScrolledToTop(YES);
 
   // Check that tab switcher and tools menu buttons are not on screen.
   [[EarlGrey selectElementWithMatcher:chrome_test_util::ShowTabsButton()]
       assertWithMatcher:grey_notVisible()];
   [[EarlGrey selectElementWithMatcher:grey_accessibilityLabel(toolsMenuLabel)]
       assertWithMatcher:grey_notVisible()];
 }
 
 @end