Rename ShellBaseTestCase as WebShellTestCase.

ios/web/shell/test/earl_grey/shell_base_test_case.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 "ios/web/shell/test/earl_grey/shell_base_test_case.h"
-
-#import <EarlGrey/EarlGrey.h>
-
-#import "ios/web/public/test/http_server.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
-
-using web::test::HttpServer;
-using web::WebViewContainingText;
-
-@implementation ShellBaseTestCase
-
-// Overrides |testInvocations| to skip all tests if a system alert view is
-// shown, since this isn't a case a user would encounter (i.e. they would
-// dismiss the alert first).
-+ (NSArray*)testInvocations {
-  // TODO(crbug.com/654085): Simply skipping all tests isn't the best way to
-  // handle this, it would be better to have something that is more obvious
-  // on the bots that this is wrong, without making it look like test flake.
-  NSError* error = nil;
-  [[EarlGrey selectElementWithMatcher:grey_systemAlertViewShown()]
-      assertWithMatcher:grey_nil()
-                  error:&error];
-  if (error != nil) {
-    NSLog(@"System alert view is present, so skipping all tests!");
-    return @[];
-  }
-  return [super testInvocations];
-}
-
-// Set up called once for the class.
-+ (void)setUp {
-  [super setUp];
-  HttpServer::GetSharedInstance().StartOrDie();
-}
-
-// Tear down called once for the class.
-+ (void)tearDown {
-  HttpServer::GetSharedInstance().Stop();
-  [super tearDown];
-}
-
-// Tear down called after each test.
-- (void)tearDown {
-  HttpServer::GetSharedInstance().RemoveAllResponseProviders();
-  [super tearDown];
-}
-
-@end