Copy the implementations of TranslateUIDelegate to TransalteInfobarDelegate

chrome/browser/translate/translate_browser_metrics.h

 // Copyright 2013 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 CHROME_BROWSER_TRANSLATE_TRANSLATE_BROWSER_METRICS_H_
 #define CHROME_BROWSER_TRANSLATE_TRANSLATE_BROWSER_METRICS_H_
 
 #include <string>
 
 namespace TranslateBrowserMetrics {
 
 // An indexing type to query each UMA entry name via GetMetricsName() function.
 // Note: |kMetricsEntries| should be updated when a new entry is added here.
 enum MetricsNameIndex {
   UMA_INITIATION_STATUS,
   UMA_LANGUAGE_DETECTION_ERROR,
   UMA_LOCALES_ON_DISABLED_BY_PREFS,
   UMA_UNDISPLAYABLE_LANGUAGE,
   UMA_UNSUPPORTED_LANGUAGE_AT_INITIATION,
+  UMA_DECLINE_TRANSLATE,
+  UMA_REVERT_TRANSLATION,

[Takashi Toyoshima, 2013/11/12 22:16:56]

DECLINE and PERFORM use _TRANSLATE, but REVER uses _TRANSLATION.
Why do you name them unsymmetrically?

+  UMA_PERFORM_TRANSLATE,
+  UMA_NEVER_TRANSLATE_LANG,
+  UMA_NEVER_TRANSLATE_SITE,
+  UMA_ALWAYS_TRANSLATE_LANG,
+  UMA_MODIFY_ORIGINAL_LANG,
+  UMA_MODIFY_TARGET_LANG,
   UMA_MAX,
 };
 
 // When Chrome Translate is ready to translate a page, one of following reason
 // decide the next browser action.
 // Note: Don't insert any item. It will change reporting UMA value, and break
 // the UMA dashboard page. Insteads, append it at the end of enum as suggested
 // below.
 enum InitiationStatusType {
   INITIATION_STATUS_DISABLED_BY_PREFS,
@@ skipping 25 matching lines @@
 void ReportUndisplayableLanguage(const std::string& language);
 
 void ReportUnsupportedLanguageAtInitiation(const std::string& language);
 
 // Provides UMA entry names for unit tests.
 const char* GetMetricsName(MetricsNameIndex index);
 
 }  // namespace TranslateBrowserMetrics
 
 #endif  // CHROME_BROWSER_TRANSLATE_TRANSLATE_BROWSER_METRICS_H_