[ios] Remove CWV_IMPLEMENTATION hack in ChromeWebView implementation.

ios/web_view/public/cwv_ui_delegate.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_PUBLIC_CWV_UI_DELEGATE_H_
 #define IOS_WEB_VIEW_PUBLIC_CWV_UI_DELEGATE_H_
 
 #import <CoreGraphics/CoreGraphics.h>
 #import <UIKit/UIKit.h>
 
-// TODO(crbug.com/704946): Make framework style include work everywhere and
-// remove this #if.
-#if defined(CWV_IMPLEMENTATION)
-#include "ios/web_view/public/cwv_export.h"
-#else
-#include <ChromeWebView/cwv_export.h>
-#endif
+#import "cwv_export.h"
 
 @class CWVHTMLElement;
 @class CWVWebView;
 @class CWVWebViewConfiguration;
 @class CWVNavigationAction;
 
 // UI delegate interface for a CWVWebView.  Embedders can implement the
 // functions in order to customize library behavior.
 CWV_EXPORT
 @protocol CWVUIDelegate<NSObject>
@@ skipping 38 matching lines @@
 - (void)webView:(CWVWebView*)webView
     runJavaScriptTextInputPanelWithPrompt:(NSString*)prompt
                               defaultText:(NSString*)defaultText
                                   pageURL:(NSURL*)URL
                         completionHandler:
                             (void (^)(NSString*))completionHandler;
 
 @end
 
 #endif  // IOS_WEB_VIEW_PUBLIC_CWV_UI_DELEGATE_H_