Split up ios/web:test_support.

ios/web/navigation/window_location_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.
 
 #import "base/mac/bind_objc_block.h"
 #include "base/mac/foundation_util.h"
 #include "base/memory/ptr_util.h"
 #import "base/strings/sys_string_conversions.h"
 #include "base/test/ios/wait_util.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"
 #include "ios/web/public/web_state/web_state_observer.h"
 #import "ios/web/test/web_int_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/gtest_mac.h"
 
 namespace {
 
 // URL for the test window.location test file.  The page at this URL contains
@@ skipping 216 matching lines @@
   SetWindowLocationUrl(sample_url);
   ExecuteBlockAndWaitForLoad(sample_url, ^{
     ASSERT_TRUE(web::test::TapWebViewElementWithId(
         web_state(), kWindowLocationSetToDOMStringID));
   });
 
   // Verify that |sample_url| was loaded and that |about_blank_item| was pruned.
   EXPECT_EQ(sample_url, navigation_manager()->GetLastCommittedItem()->GetURL());
   EXPECT_EQ(NSNotFound, GetIndexOfNavigationItem(about_blank_item));
 }