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

ios/web_view/public/cwv_delegate.h

Index: ios/web_view/public/cwv_delegate.h
diff --git a/ios/web_view/public/cwv_delegate.h b/ios/web_view/public/cwv_delegate.h
index 8000a2eb5b1971c92979581910ac7567c8f0548e..542f87fc549981b5d10c3b5e22d551488129230d 100644
--- a/ios/web_view/public/cwv_delegate.h
+++ b/ios/web_view/public/cwv_delegate.h
@@ -4,10 +4,19 @@
 #ifndef IOS_WEB_VIEW_PUBLIC_CWV_DELEGATE_H_
 #define IOS_WEB_VIEW_PUBLIC_CWV_DELEGATE_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
+
 @class NSString;
 
 // Delegate interface for the CWV library.  Embedders can implement the
 // functions in order to customize library behavior.
+CWV_EXPORT
 @protocol CWVDelegate
 
 // Returns a partial user agent of the form "ProductName/Version".