Implementation of translation event logging.

ios/web_view/internal/translate/web_view_translate_client.mm

 // 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.
 
 #import "ios/web_view/internal/translate/web_view_translate_client.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #import "base/mac/scoped_nsobject.h"
@@ skipping 94 matching lines @@
               web_state()->GetBrowserState()));
   DCHECK(accept_languages);
   return accept_languages;
 }
 
 int WebViewTranslateClient::GetInfobarIconID() const {
   NOTREACHED();
   return 0;
 }
 
+void WebViewTranslateClient::RecordTranslateEvent(
+    const metrics::TranslateEventProto&) {
+  // TODO(renjieliu): Implementing gaia-keyed logging.

[Eugene But (OOO till 7-30), 2017/06/12 01:50:00]

ditto

[renjieliu1, 2017/06/13 00:04:59]

Done.

+}
+
 bool WebViewTranslateClient::IsTranslatableURL(const GURL& url) {
   return !url.is_empty() && !url.SchemeIs(url::kFtpScheme);
 }
 
 void WebViewTranslateClient::ShowReportLanguageDetectionErrorUI(
     const GURL& report_url) {
   NOTREACHED();
 }
 
 void WebViewTranslateClient::WebStateDestroyed() {
   // Translation process can be interrupted.
   // Destroying the TranslateManager now guarantees that it never has to deal
   // with nullptr WebState.
   translate_manager_.reset();
 }
 
 }  // namespace ios_web_view