Consolidated all CWVWebView test helpers inside web_view_test_util file.

ios/web_view/test/chrome_web_view_restorable_state_inttest.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 <ChromeWebView/ChromeWebView.h>
 
 #import "ios/web_view/test/chrome_web_view_test.h"
 #import "ios/web_view/test/web_view_test_util.h"
 #include "testing/gtest_mac.h"
 
@@ skipping 23 matching lines @@
 
 // Tests encodeRestorableStateWithCoder: and decodeRestorableStateWithCoder:
 // methods.
 typedef ios_web_view::ChromeWebViewTest ChromeWebViewRestorableStateTest;
 TEST_F(ChromeWebViewRestorableStateTest, EncodeDecode) {
   // Load 2 URLs to create non-default state.
   ASSERT_FALSE([web_view_ lastCommittedURL]);
   ASSERT_FALSE([web_view_ visibleURL]);
   ASSERT_FALSE([web_view_ canGoBack]);
   ASSERT_FALSE([web_view_ canGoForward]);
-  LoadUrl(web_view_, [NSURL URLWithString:@"about:newtab"]);
+  ASSERT_TRUE(test::LoadUrl(web_view_, [NSURL URLWithString:@"about:newtab"]));
   ASSERT_NSEQ(@"about:newtab", [web_view_ lastCommittedURL].absoluteString);
   ASSERT_NSEQ(@"about:newtab", [web_view_ visibleURL].absoluteString);
-  LoadUrl(web_view_, [NSURL URLWithString:@"about:blank"]);
+  ASSERT_TRUE(test::LoadUrl(web_view_, [NSURL URLWithString:@"about:blank"]));
   ASSERT_NSEQ(@"about:blank", [web_view_ lastCommittedURL].absoluteString);
   ASSERT_NSEQ(@"about:blank", [web_view_ visibleURL].absoluteString);
   ASSERT_TRUE([web_view_ canGoBack]);
   ASSERT_FALSE([web_view_ canGoForward]);
 
   // Create second web view and restore its state from the first web view.
   CWVWebView* restored_web_view = CreateWebViewWithState(web_view_);
 
   // Verify that the state has been restored correctly.
   EXPECT_NSEQ(@"about:blank",
               [restored_web_view lastCommittedURL].absoluteString);
   EXPECT_NSEQ(@"about:blank", [restored_web_view visibleURL].absoluteString);
   EXPECT_TRUE([web_view_ canGoBack]);
   EXPECT_FALSE([web_view_ canGoForward]);
 }
 
 }  // namespace ios_web_view