Implementation of translation event logging.

ios/chrome/browser/translate/chrome_ios_translate_client.h

Index: ios/chrome/browser/translate/chrome_ios_translate_client.h
diff --git a/ios/chrome/browser/translate/chrome_ios_translate_client.h b/ios/chrome/browser/translate/chrome_ios_translate_client.h
index da7d42081599054064fe415294f078c807e01f7c..b7b6400bffccc35f18dd86d2df75531920e7544b 100644
--- a/ios/chrome/browser/translate/chrome_ios_translate_client.h
+++ b/ios/chrome/browser/translate/chrome_ios_translate_client.h
@@ -18,6 +18,10 @@
 
 class PrefService;
 
+namespace metrics {
+class TranslateEventProto;
+}
+
 namespace translate {
 class TranslateAcceptLanguages;
 class TranslatePrefs;
@@ -48,6 +52,7 @@ class ChromeIOSTranslateClient
   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;