[ios] Extracted web_test.h classes into separate files.

ios/web/web_state/ui/crw_web_controller_unittest.mm

 // Copyright 2012 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/web_state/ui/crw_web_controller.h"
 
 #import <WebKit/WebKit.h>
 
 #include <utility>
 
 #include "base/callback_helpers.h"
 #include "base/ios/ios_util.h"
 #import "base/mac/bind_objc_block.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/test/histogram_tester.h"
 #import "base/test/ios/wait_util.h"
 #include "base/values.h"
 #import "ios/testing/ocmock_complex_type_helper.h"
 #include "ios/web/navigation/crw_session_controller.h"
 #include "ios/web/navigation/crw_session_entry.h"
 #include "ios/web/navigation/navigation_item_impl.h"
 #import "ios/web/navigation/navigation_manager_impl.h"
 #include "ios/web/public/referrer.h"
+#import "ios/web/public/test/test_web_client.h"
 #include "ios/web/public/test/test_web_view_content_view.h"
 #import "ios/web/public/web_state/crw_web_controller_observer.h"
 #import "ios/web/public/web_state/ui/crw_content_view.h"
 #import "ios/web/public/web_state/ui/crw_web_view_content_view.h"
 #include "ios/web/public/web_state/url_verification_constants.h"
 #import "ios/web/test/web_test.h"
 #import "ios/web/test/wk_web_view_crash_utils.h"
 #include "ios/web/web_state/blocked_popup_info.h"
 #import "ios/web/web_state/js/crw_js_invoke_parameter_queue.h"
 #import "ios/web/web_state/ui/crw_web_controller_container_view.h"
@@ skipping 1026 matching lines @@
 
   [webController_ setDelegate:delegate];
   web::SimulateWKWebViewCrash(webView_);
 
   EXPECT_OCMOCK_VERIFY(delegate);
   EXPECT_FALSE([webController_ isViewAlive]);
   [webController_ setDelegate:nil];
 };
 
 }  // namespace