Split up ios/web:test_support.

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/web_shell_test_case.h"
 
 #import <EarlGrey/EarlGrey.h>
 
-#import "ios/web/public/test/http_server.h"
+#import "ios/web/public/test/http_server/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 WebShellTestCase
@@ skipping 28 matching lines @@
   [super tearDown];
 }
 
 // Tear down called after each test.
 - (void)tearDown {
   HttpServer::GetSharedInstance().RemoveAllResponseProviders();
   [super tearDown];
 }
 
 @end