Convert WindowOpenDisposition to an enum class.

components/ntp_snippets/content_suggestions_metrics.cc

 // Copyright 2016 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/ntp_snippets/content_suggestions_metrics.h"
 
 #include <string>
 
 #include "base/metrics/histogram.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 163 matching lines @@
   UMA_HISTOGRAM_ENUMERATION(kHistogramOpened, global_position,
                             kMaxSuggestionsTotal);
   LogCategoryHistogramEnumeration(kHistogramOpened, category, category_position,
                                   kMaxSuggestionsPerCategory);
 
   base::TimeDelta age = base::Time::Now() - publish_date;
   LogCategoryHistogramAge(kHistogramOpenedAge, category, age);
 
   LogCategoryHistogramScore(kHistogramOpenedScore, category, score);
 
-  UMA_HISTOGRAM_ENUMERATION(kHistogramOpenDisposition, disposition,
-                            WINDOW_OPEN_DISPOSITION_LAST + 1);
-  LogCategoryHistogramEnumeration(kHistogramOpenDisposition, category,
-                                  disposition,
-                                  WINDOW_OPEN_DISPOSITION_LAST + 1);
+  UMA_HISTOGRAM_ENUMERATION(
+      kHistogramOpenDisposition, static_cast<int>(disposition),
+      static_cast<int>(WindowOpenDisposition::MAX_VALUE) + 1);
+  LogCategoryHistogramEnumeration(
+      kHistogramOpenDisposition, category, static_cast<int>(disposition),
+      static_cast<int>(WindowOpenDisposition::MAX_VALUE) + 1);
 }
 
 void OnSuggestionMenuOpened(int global_position,
                             Category category,
                             int category_position,
                             base::Time publish_date,
                             float score) {
   UMA_HISTOGRAM_ENUMERATION(kHistogramMenuOpened, global_position,
                             kMaxSuggestionsTotal);
   LogCategoryHistogramEnumeration(kHistogramMenuOpened, category,
@@ skipping 19 matching lines @@
 
 void OnMoreButtonClicked(Category category, int position) {
   // The "more" card can appear in addition to the actual suggestions, so add
   // one extra bucket to this histogram.
   LogCategoryHistogramEnumeration(kHistogramMoreButtonClicked, category,
                                   position, kMaxSuggestionsPerCategory + 1);
 }
 
 }  // namespace metrics
 }  // namespace ntp_snippets