Implementation of translation event logging.

ios/web_view/internal/translate/web_view_translate_client.h

Index: ios/web_view/internal/translate/web_view_translate_client.h
diff --git a/ios/web_view/internal/translate/web_view_translate_client.h b/ios/web_view/internal/translate/web_view_translate_client.h
index b214e5f98946f7136e046d745beef6869d84401d..d3d39ec1a5ca2c457568bb5b9fb0017595c6a1b7 100644
--- a/ios/web_view/internal/translate/web_view_translate_client.h
+++ b/ios/web_view/internal/translate/web_view_translate_client.h
@@ -20,6 +20,10 @@
 
 class PrefService;
 
+namespace metrics {
+class TranslateEventProto;
+}
+
 namespace translate {
 class TranslateAcceptLanguages;
 class TranslatePrefs;
@@ -60,6 +64,7 @@ class WebViewTranslateClient
   std::unique_ptr<translate::TranslatePrefs> GetTranslatePrefs() override;
   translate::TranslateAcceptLanguages* GetTranslateAcceptLanguages() override;
   int GetInfobarIconID() const override;
+  void RecordTranslateEvent(const metrics::TranslateEventProto&) override;
   std::unique_ptr<infobars::InfoBar> CreateInfoBar(
       std::unique_ptr<translate::TranslateInfoBarDelegate> delegate)
       const override;