Rename ShellBaseTestCase as WebShellTestCase.

ios/web/shell/test/earl_grey/web_shell_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 "ios/web/shell/test/earl_grey/web_shell_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
+@implementation WebShellTestCase
 
 // 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()]
@@ skipping 18 matching lines @@
   [super tearDown];
 }
 
 // Tear down called after each test.
 - (void)tearDown {
   HttpServer::GetSharedInstance().RemoveAllResponseProviders();
   [super tearDown];
 }
 
 @end