Cleanup ios_web_view integration tests.

ios/web_view/test/web_view_interaction_test_util.h

-// 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.
-
-#ifndef IOS_WEB_VIEW_TEST_WEB_VIEW_INTERACTION_TEST_UTIL_H_
-#define IOS_WEB_VIEW_TEST_WEB_VIEW_INTERACTION_TEST_UTIL_H_
-
-#import <Foundation/Foundation.h>
-
-@class CWVWebView;
-
-namespace ios_web_view {
-namespace test {
-
-// Returns whether the element with |element_id| in the passed |web_view| has
-// been tapped using a JavaScript click() event.
-bool TapChromeWebViewElementWithId(CWVWebView* web_view, NSString* element_id);
-
-// Waits until |script| is executed and synchronously returns the evaluation
-// result.
-id EvaluateJavaScript(CWVWebView* web_view, NSString* script, NSError** error);
-
-// Waits for |web_view| to contain |text|. Returns false if the condition is not
-// met within a timeout.
-bool WaitForWebViewContainingTextOrTimeout(CWVWebView* web_view,
-                                           NSString* text);
-
-}  // namespace test
-}  // namespace ios_web_view
-
-#endif  // IOS_WEB_VIEW_TEST_WEB_VIEW_INTERACTION_TEST_UTIL_H_