Export all CWV* symbols from the ios/web_view dynamic library.

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>
 
+#if defined(CWV_IMPLEMENTATION)
+#include "ios/web_view/public/cwv_export.h"
+#else
+#include <ChromeWebView/cwv_export.h>
+#endif
+
 @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.
-@protocol CWVUIDelegate<NSObject>
+CWV_EXPORT @protocol CWVUIDelegate<NSObject>
 
 @optional
 // Instructs the delegate to create a new browsing window (f.e. in response to
 // window.open JavaScript call). Page will not open a window if this method
 // returns nil or is not implemented. This method can not return |webView|.
 - (CWVWebView*)webView:(CWVWebView*)webView
     createWebViewWithConfiguration:(CWVWebViewConfiguration*)configuration
                forNavigationAction:(CWVNavigationAction*)action;
 
 // Instructs the delegate to close |webView|. Called only for windows opened by
@@ skipping 28 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_