Consolidated all CWVWebView test helpers inside web_view_test_util file.

ios/web_view/test/web_view_test_util.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/web_view_test_util.h"
 
 #import <ChromeWebView/ChromeWebView.h>
 
 #import "ios/testing/wait_util.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 using testing::WaitUntilConditionOrTimeout;
 
 namespace ios_web_view {
 namespace test {
 
 CWVWebView* CreateWebView() {
   return [[CWVWebView alloc]
       initWithFrame:UIScreen.mainScreen.bounds
       configuration:[CWVWebViewConfiguration defaultConfiguration]];
 }
 
-bool TapChromeWebViewElementWithId(CWVWebView* web_view, NSString* element_id) {
+bool LoadUrl(CWVWebView* web_view, NSURL* url) {
+  [web_view loadRequest:[NSURLRequest requestWithURL:url]];
+
+  return WaitForWebViewLoadCompletionOrTimeout(web_view);
+}
+
+bool TapWebViewElementWithId(CWVWebView* web_view, NSString* element_id) {
   // TODO(crbug.com/725524): Share this script with Chrome.
   NSString* script = [NSString
       stringWithFormat:@"(function() {"
                         "  var element = document.getElementById('%@');"
                         "  if (element) {"
                         "    element.click();"
                         "    return true;"
                         "  }"
                         "  return false;"
                         "})();",
@@ skipping 24 matching lines @@
 
 bool WaitForWebViewContainingTextOrTimeout(CWVWebView* web_view,
                                            NSString* text) {
   return WaitUntilConditionOrTimeout(testing::kWaitForUIElementTimeout, ^{
     id body = ios_web_view::test::EvaluateJavaScript(
         web_view, @"document.body ? document.body.textContent : null", nil);
     return [body isKindOfClass:[NSString class]] && [body containsString:text];
   });
 }
 
+bool WaitForWebViewLoadCompletionOrTimeout(CWVWebView* web_view) {
+  return WaitUntilConditionOrTimeout(testing::kWaitForPageLoadTimeout, ^{
+    return !web_view.loading;
+  });
+}
+
 }  // namespace test
 }  // namespace ios_web_view