Removed translate MetricsNameIndex.

components/translate/core/common/translate_metrics.cc

 // 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.
 
 #include "components/translate/core/common/translate_metrics.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <algorithm>
 
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/metrics_hashes.h"
 #include "url/url_constants.h"
 
 namespace translate {
 
-namespace {
+namespace metrics_internal {
 
-// Constant string values to indicate UMA names. All entries should have
-// a corresponding index in MetricsNameIndex and an entry in |kMetricsEntries|.
 const char kRenderer4LanguageDetection[] = "Renderer4.LanguageDetection";
 const char kTranslateContentLanguage[] = "Translate.ContentLanguage";
 const char kTranslateHtmlLang[] = "Translate.HtmlLang";
 const char kTranslateLanguageVerification[] = "Translate.LanguageVerification";
 const char kTranslateTimeToBeReady[] = "Translate.TimeToBeReady";
 const char kTranslateTimeToLoad[] = "Translate.TimeToLoad";
 const char kTranslateTimeToTranslate[] = "Translate.TimeToTranslate";
 const char kTranslateUserActionDuration[] = "Translate.UserActionDuration";
 const char kTranslatePageScheme[] = "Translate.PageScheme";
 const char kTranslateSimilarLanguageMatch[] = "Translate.SimilarLanguageMatch";
 const char kTranslateLanguageDetectionConflict[] =
     "Translate.LanguageDetectionConflict";
 
-struct MetricsEntry {
-  MetricsNameIndex index;
-  const char* const name;
-};
+}  // namespace metrics_internal
 
-// This entry table should be updated when new UMA items are added.
-const MetricsEntry kMetricsEntries[] = {
-    {UMA_LANGUAGE_DETECTION, kRenderer4LanguageDetection},
-    {UMA_CONTENT_LANGUAGE, kTranslateContentLanguage},
-    {UMA_HTML_LANG, kTranslateHtmlLang},
-    {UMA_LANGUAGE_VERIFICATION, kTranslateLanguageVerification},
-    {UMA_TIME_TO_BE_READY, kTranslateTimeToBeReady},
-    {UMA_TIME_TO_LOAD, kTranslateTimeToLoad},
-    {UMA_TIME_TO_TRANSLATE, kTranslateTimeToTranslate},
-    {UMA_USER_ACTION_DURATION, kTranslateUserActionDuration},
-    {UMA_PAGE_SCHEME, kTranslatePageScheme},
-    {UMA_SIMILAR_LANGUAGE_MATCH, kTranslateSimilarLanguageMatch},
-    {UMA_LANGUAGE_DETECTION_CONFLICT, kTranslateLanguageDetectionConflict},
-};
-
-static_assert(arraysize(kMetricsEntries) == UMA_MAX,
-              "kMetricsEntries should have UMA_MAX elements");
+namespace {
 
 // Page languages for which we track CLD3 language conflicts.
 const char* kLanguageDetectionConflictPageLangs[] = {
     "en", "en-US", "en-GB", "en-CA", "en-AU", "en-NZ", "en-ZA", "en-IN"};
 
 LanguageCheckType GetLanguageCheckMetric(const std::string& provided_code,
                                          const std::string& revised_code) {
   if (provided_code.empty())
     return LANGUAGE_NOT_PROVIDED;
   else if (provided_code == revised_code)
     return LANGUAGE_VALID;
   return LANGUAGE_INVALID;
 }
 
 }  // namespace
 
 void ReportContentLanguage(const std::string& provided_code,
                            const std::string& revised_code) {
-  UMA_HISTOGRAM_ENUMERATION(kTranslateContentLanguage,
+  UMA_HISTOGRAM_ENUMERATION(metrics_internal::kTranslateContentLanguage,
                             GetLanguageCheckMetric(provided_code, revised_code),
                             LANGUAGE_MAX);
 }
 
 void ReportHtmlLang(const std::string& provided_code,
                     const std::string& revised_code) {
-  UMA_HISTOGRAM_ENUMERATION(kTranslateHtmlLang,
+  UMA_HISTOGRAM_ENUMERATION(metrics_internal::kTranslateHtmlLang,
                             GetLanguageCheckMetric(provided_code, revised_code),
                             LANGUAGE_MAX);
 }
 
 void ReportLanguageVerification(LanguageVerificationType type) {
-  UMA_HISTOGRAM_ENUMERATION(kTranslateLanguageVerification, type,
-                            LANGUAGE_VERIFICATION_MAX);
+  UMA_HISTOGRAM_ENUMERATION(metrics_internal::kTranslateLanguageVerification,
+                            type, LANGUAGE_VERIFICATION_MAX);
 }
 
 void ReportTimeToBeReady(double time_in_msec) {
-  UMA_HISTOGRAM_MEDIUM_TIMES(kTranslateTimeToBeReady,
+  UMA_HISTOGRAM_MEDIUM_TIMES(metrics_internal::kTranslateTimeToBeReady,
                              base::TimeDelta::FromMicroseconds(
                                  static_cast<int64_t>(time_in_msec * 1000.0)));
 }
 
 void ReportTimeToLoad(double time_in_msec) {
-  UMA_HISTOGRAM_MEDIUM_TIMES(kTranslateTimeToLoad,
+  UMA_HISTOGRAM_MEDIUM_TIMES(metrics_internal::kTranslateTimeToLoad,
                              base::TimeDelta::FromMicroseconds(
                                  static_cast<int64_t>(time_in_msec * 1000.0)));
 }
 
 void ReportTimeToTranslate(double time_in_msec) {
-  UMA_HISTOGRAM_MEDIUM_TIMES(kTranslateTimeToTranslate,
+  UMA_HISTOGRAM_MEDIUM_TIMES(metrics_internal::kTranslateTimeToTranslate,
                              base::TimeDelta::FromMicroseconds(
                                  static_cast<int64_t>(time_in_msec * 1000.0)));
 }
 
 void ReportUserActionDuration(base::TimeTicks begin, base::TimeTicks end) {
-  UMA_HISTOGRAM_LONG_TIMES(kTranslateUserActionDuration, end - begin);
+  UMA_HISTOGRAM_LONG_TIMES(metrics_internal::kTranslateUserActionDuration,
+                           end - begin);
 }
 
 void ReportPageScheme(const std::string& scheme) {
   SchemeType type = SCHEME_OTHERS;
   if (scheme == url::kHttpScheme)
     type = SCHEME_HTTP;
   else if (scheme == url::kHttpsScheme)
     type = SCHEME_HTTPS;
-  UMA_HISTOGRAM_ENUMERATION(kTranslatePageScheme, type, SCHEME_MAX);
+  UMA_HISTOGRAM_ENUMERATION(metrics_internal::kTranslatePageScheme, type,
+                            SCHEME_MAX);
 }
 
 void ReportLanguageDetectionTime(base::TimeTicks begin, base::TimeTicks end) {
-  UMA_HISTOGRAM_MEDIUM_TIMES(kRenderer4LanguageDetection, end - begin);
+  UMA_HISTOGRAM_MEDIUM_TIMES(metrics_internal::kRenderer4LanguageDetection,
+                             end - begin);
 }
 
 void ReportSimilarLanguageMatch(bool match) {
-  UMA_HISTOGRAM_BOOLEAN(kTranslateSimilarLanguageMatch, match);
+  UMA_HISTOGRAM_BOOLEAN(metrics_internal::kTranslateSimilarLanguageMatch,
+                        match);
 }
 
 void ReportLanguageDetectionConflict(const std::string& page_lang,
                                      const std::string& cld_lang) {
   const char* const* const it =
       std::find(std::begin(kLanguageDetectionConflictPageLangs),
                 std::end(kLanguageDetectionConflictPageLangs), page_lang);
   const std::string page_lang_token =
       it == std::end(kLanguageDetectionConflictPageLangs) ? "other" : *it;
 
   UMA_HISTOGRAM_SPARSE_SLOWLY(
-      kTranslateLanguageDetectionConflict,
+      metrics_internal::kTranslateLanguageDetectionConflict,
       base::HashMetricName(page_lang_token + "," + cld_lang));
 }
 
-const char* GetMetricsName(MetricsNameIndex index) {
-  for (size_t i = 0; i < arraysize(kMetricsEntries); ++i) {
-    if (kMetricsEntries[i].index == index)
-      return kMetricsEntries[i].name;
-  }
-  NOTREACHED();
-  return NULL;
-}
-
 }  // namespace translate