Split up ios/web:test_support.

ios/web/navigation/history_state_operations_inttest.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.
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #import "ios/testing/wait_util.h"
 #import "ios/web/navigation/navigation_item_impl.h"
 #import "ios/web/public/navigation_item.h"
 #import "ios/web/public/navigation_manager.h"
-#import "ios/web/public/test/http_server.h"
-#include "ios/web/public/test/http_server_util.h"
+#import "ios/web/public/test/http_server/http_server.h"
+#include "ios/web/public/test/http_server/http_server_util.h"
 #import "ios/web/public/test/web_view_interaction_test_util.h"
 #import "ios/web/public/web_state/web_state.h"
 #import "ios/web/test/web_int_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
 #include "url/url_canon.h"
 
 using base::ASCIIToUTF16;
 
 namespace {
@@ skipping 408 matching lines @@
   // Verify that url has been replaced.
   BOOL completed =
       testing::WaitUntilConditionOrTimeout(kWaitForStateUpdateTimeout, ^{
         return GetLastCommittedItem()->GetURL() == new_url;
       });
   EXPECT_TRUE(completed) << "Failed to validate current url.";
   // Verify that the hashchange event was not fired.
   EXPECT_FALSE(static_cast<web::NavigationItemImpl*>(GetLastCommittedItem())
                    ->IsCreatedFromHashChange());
 }