[ios] Implemented Meta Tags EarlGrey tests.

ios/web/shell/test/page_state_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 <CoreGraphics/CoreGraphics.h>
 #import <EarlGrey/EarlGrey.h>
 #import <Foundation/Foundation.h>
 #import <XCTest/XCTest.h>
 
 #import "ios/web/public/test/http_server.h"
@@ skipping 34 matching lines @@
       nil);
 }
 
 }  // namespace
 
 using web::shell_test_util::LoadUrl;
 using web::test::HttpServer;
 using web::webViewContainingText;
 
 // Page state test cases for the web shell.
-@interface CRWWebShellPageStateTest : ShellBaseTestCase
-

[baxley, 2016/07/22 18:36:18]

super-tiny nit: Should we make this the same in the other tests files? I don't
know if the style rule is to have a blank line or not in an empty @interface, so
either is fine with me.

[Eugene But (OOO till 7-30), 2016/07/22 22:56:57]

There is no rule for this, probably did by accident. Change everywhere in a
separate CL.

+@interface PageStateTest : ShellBaseTestCase
 @end
 
-@implementation CRWWebShellPageStateTest
+@implementation PageStateTest
 
 // Tests that page scroll position of a page is restored upon returning to the
 // page via the back/forward buttons.
 - (void)testScrollPositionRestoring {
   web::test::SetUpFileBasedHttpServer();
 
   // Load first URL which is a long page.
   LoadUrl(HttpServer::MakeUrl(kLongPage1));
   // TODO(crbug.com/629116): Remove this once |LoadUrl| waits for the load
   // completion.
@@ skipping 29 matching lines @@
       assertWithMatcher:contentOffset(CGPointMake(0, kScrollOffset1))];
 
   // Go forward and verify that the second page offset has been restored.
   [[EarlGrey selectElementWithMatcher:web::forwardButton()]
       performAction:grey_tap()];
   [[EarlGrey selectElementWithMatcher:web::webViewScrollView()]
       assertWithMatcher:contentOffset(CGPointMake(0, kScrollOffset2))];
 }
 
 @end