Cleanup ios_web_view integration tests.

ios/web_view/test/chrome_web_view_test.mm

 // Copyright 2017 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_view/test/chrome_web_view_test.h"
 
 #import <ChromeWebView/ChromeWebView.h>
 #import <Foundation/Foundation.h>
 
 #include "base/base64.h"
 #import "base/memory/ptr_util.h"
 #include "base/strings/stringprintf.h"
 #import "ios/testing/wait_util.h"
+#import "ios/web_view/test/web_view_test_util.h"
 #include "net/base/url_util.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "net/test/embedded_test_server/http_request.h"
 #include "net/test/embedded_test_server/http_response.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
@@ skipping 66 matching lines @@
     return CreatePageHTMLResponse(title, body);
   }
   return nullptr;
 }
 
 }  // namespace
 
 namespace ios_web_view {
 
 ChromeWebViewTest::ChromeWebViewTest()
-    : test_server_(base::MakeUnique<net::EmbeddedTestServer>(
+    : web_view_(test::CreateWebView()),
+      test_server_(base::MakeUnique<net::EmbeddedTestServer>(
           net::test_server::EmbeddedTestServer::TYPE_HTTP)) {
   test_server_->RegisterRequestHandler(base::Bind(&TestRequestHandler));
 }
 
 ChromeWebViewTest::~ChromeWebViewTest() = default;
 
 void ChromeWebViewTest::SetUp() {
   PlatformTest::SetUp();
   ASSERT_TRUE(test_server_->Start());
 }
@@ skipping 28 matching lines @@
 
 void ChromeWebViewTest::WaitForPageLoadCompletion(CWVWebView* web_view) {
   BOOL success =
       testing::WaitUntilConditionOrTimeout(testing::kWaitForPageLoadTimeout, ^{
         return !web_view.isLoading;
       });
   ASSERT_TRUE(success);
 }
 
 }  // namespace ios_web_view