Cleanup ios_web_view integration tests.

ios/web_view/test/web_view_interaction_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_interaction_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 {
-
-bool TapChromeWebViewElementWithId(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;"
-                        "})();",
-                       element_id];
-  return [EvaluateJavaScript(web_view, script, nil) boolValue];
-}
-
-id EvaluateJavaScript(CWVWebView* web_view, NSString* script, NSError** error) {
-  __block bool did_complete = false;
-  __block id evaluation_result = nil;
-  __block id evaluation_error = nil;
-  [web_view evaluateJavaScript:script
-             completionHandler:^(id local_result, NSError* local_error) {
-               did_complete = true;
-               evaluation_result = [local_result copy];
-               evaluation_error = [local_error copy];
-             }];
-
-  WaitUntilConditionOrTimeout(testing::kWaitForJSCompletionTimeout, ^{
-    return did_complete;
-  });
-
-  if (error)
-    *error = evaluation_error;
-
-  return evaluation_result;
-}
-
-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];
-  });
-}
-
-}  // namespace test
-}  // namespace ios_web_view