Implementation of translation event logging.

ios/chrome/browser/translate/chrome_ios_translate_client.h

 // Copyright 2014 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_CHROME_BROWSER_TRANSLATE_CHROME_IOS_TRANSLATE_CLIENT_H_
 #define IOS_CHROME_BROWSER_TRANSLATE_CHROME_IOS_TRANSLATE_CLIENT_H_
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "components/translate/core/browser/translate_client.h"
 #include "components/translate/core/browser/translate_step.h"
 #include "components/translate/core/common/translate_errors.h"
 #include "components/translate/ios/browser/ios_translate_driver.h"
 #include "ios/web/public/web_state/web_state_observer.h"
 #include "ios/web/public/web_state/web_state_user_data.h"
 
 class PrefService;
 
+namespace metrics {
+class TranslateEventProto;
+}  // namespace metrics
+
 namespace translate {
 class TranslateAcceptLanguages;
 class TranslatePrefs;
 class TranslateManager;
 }  // namespace translate
 
 namespace web {
 class WebState;
-}
+}  // namespace web
 
 class ChromeIOSTranslateClient
     : public translate::TranslateClient,
       public web::WebStateObserver,
       public web::WebStateUserData<ChromeIOSTranslateClient> {
  public:
   ~ChromeIOSTranslateClient() override;
 
   // Helper method to return a new TranslatePrefs instance.
   static std::unique_ptr<translate::TranslatePrefs> CreateTranslatePrefs(
       PrefService* prefs);
 
   // Gets the associated TranslateManager.
   translate::TranslateManager* GetTranslateManager();
 
   // TranslateClient implementation.
   translate::TranslateDriver* GetTranslateDriver() override;
   PrefService* GetPrefs() override;
   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;
   void ShowTranslateUI(translate::TranslateStep step,
                        const std::string& source_language,
                        const std::string& target_language,
                        translate::TranslateErrors::Type error_type,
                        bool triggered_from_menu) override;
   bool IsTranslatableURL(const GURL& url) override;
   void ShowReportLanguageDetectionErrorUI(const GURL& report_url) override;
 
  private:
   explicit ChromeIOSTranslateClient(web::WebState* web_state);
   friend class web::WebStateUserData<ChromeIOSTranslateClient>;
 
   // web::WebStateObserver implementation.
   void WebStateDestroyed() override;
 
   std::unique_ptr<translate::TranslateManager> translate_manager_;
   translate::IOSTranslateDriver translate_driver_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeIOSTranslateClient);
 };
 
 #endif  // IOS_CHROME_BROWSER_TRANSLATE_CHROME_IOS_TRANSLATE_CLIENT_H_