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

ios/web_view/public/cwv_translate_delegate.h

Index: ios/web_view/public/cwv_translate_delegate.h
diff --git a/ios/web_view/public/cwv_translate_delegate.h b/ios/web_view/public/cwv_translate_delegate.h
index ff3576cef579c8ff5b570a9945e6a7f615068824..95b3b37bcb1b65b2928864da01ba783b8b7d3317 100644
--- a/ios/web_view/public/cwv_translate_delegate.h
+++ b/ios/web_view/public/cwv_translate_delegate.h
@@ -7,6 +7,12 @@
 
 #import <Foundation/Foundation.h>
 
+#if defined(CWV_IMPLEMENTATION)
+#include "ios/web_view/public/cwv_export.h"
+#else
+#include <ChromeWebView/cwv_export.h>
+#endif
+
 @protocol CRIWVTranslateManager;
 
 typedef NS_ENUM(NSInteger, CRIWVTransateStep) {
@@ -18,7 +24,7 @@ typedef NS_ENUM(NSInteger, CRIWVTransateStep) {
 
 // Delegate interface for the CRIWVTranslate.  Embedders can implement the
 // functions in order to customize the behavior.
-@protocol CWVTranslateDelegate
+CWV_EXPORT @protocol CWVTranslateDelegate
 
 - (void)translateStepChanged:(CRIWVTransateStep)step
                      manager:(id<CRIWVTranslateManager>)manager;