[ios] Removed web_shell_ prefix from EG tests.

ios/web/shell/test/web_shell_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"
-#include "ios/web/public/test/http_server_util.h"
-#include "ios/web/shell/test/app/navigation_test_util.h"
-#import "ios/web/shell/test/earl_grey/shell_base_test_case.h"
-#import "ios/web/shell/test/earl_grey/shell_matchers.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-// URLs for test pages.
-const char kLongPage1[] =
-    "http://ios/web/shell/test/http_server_files/tall_page.html";
-const char kLongPage2[] =
-    "http://ios/web/shell/test/http_server_files/tall_page.html?2";
-
-// Test scroll offsets.
-const CGFloat kScrollOffset1 = 20.0f;
-const CGFloat kScrollOffset2 = 40.0f;
-
-// Returns a matcher for asserting that element's content offset matches the
-// given |offset|.
-id<GREYMatcher> contentOffset(CGPoint offset) {
-  MatchesBlock matches = ^BOOL(UIScrollView* element) {
-    return CGPointEqualToPoint([element contentOffset], offset);
-  };
-  DescribeToBlock describe = ^(id<GREYDescription> description) {
-    [description appendText:@"contentOffset"];
-  };
-  return grey_allOf(
-      grey_kindOfClass([UIScrollView class]),
-      [[GREYElementMatcherBlock alloc] initWithMatchesBlock:matches
-                                           descriptionBlock:describe],
-      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
-
-@end
-
-@implementation CRWWebShellPageStateTest
-
-// 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.
-  [[EarlGrey selectElementWithMatcher:webViewContainingText("List of numbers")]
-      assertWithMatcher:grey_notNil()];
-
-  // Scroll the first page and verify the offset.
-  [[EarlGrey selectElementWithMatcher:web::webViewScrollView()]
-      performAction:grey_scrollInDirection(kGREYDirectionDown, kScrollOffset1)];
-  [[EarlGrey selectElementWithMatcher:web::webViewScrollView()]
-      assertWithMatcher:contentOffset(CGPointMake(0, kScrollOffset1))];
-
-  // Load second URL, which is also a long page.
-  GURL URL2 = HttpServer::MakeUrl(kLongPage2);
-  LoadUrl(URL2);
-  // TODO(crbug.com/629116): Remove these once |LoadUrl| waits for the load
-  // completion.
-  [[EarlGrey selectElementWithMatcher:web::addressFieldText(URL2.spec())]
-      assertWithMatcher:grey_notNil()];
-  [[EarlGrey selectElementWithMatcher:webViewContainingText("List of numbers")]
-      assertWithMatcher:grey_notNil()];
-
-  // Scroll the second page and verify the offset.
-  [[EarlGrey selectElementWithMatcher:web::webViewScrollView()]
-      performAction:grey_scrollInDirection(kGREYDirectionDown, kScrollOffset2)];
-  [[EarlGrey selectElementWithMatcher:web::webViewScrollView()]
-      assertWithMatcher:contentOffset(CGPointMake(0, kScrollOffset2))];
-
-  // Go back and verify that the first page offset has been restored.
-  [[EarlGrey selectElementWithMatcher:web::backButton()]
-      performAction:grey_tap()];
-  [[EarlGrey selectElementWithMatcher:web::webViewScrollView()]
-      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