Use stricter type checking in UMA_HISTOGRAM_ENUMERATION

chrome/browser/metrics/android_metrics_provider.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 "chrome/browser/metrics/android_metrics_provider.h"
 
 #include "base/metrics/histogram_macros.h"
 #include "base/sys_info.h"
 #include "base/values.h"
 #include "chrome/browser/android/feature_utilities.h"
@@ skipping 126 matching lines @@
        ++activity_type) {
     int launch_count = 0;
     int crash_count = 0;
 
     launch_counts->GetInteger(activity_type, &launch_count);
     crash_counts->GetInteger(activity_type, &crash_count);
 
     for (int count = 0; count < launch_count; ++count) {
       UMA_STABILITY_HISTOGRAM_ENUMERATION(
           "Chrome.Android.Activity.LaunchCounts",
-          activity_type,
+          static_cast<ActivityTypeIds::Type>(activity_type),
           ActivityTypeIds::ACTIVITY_MAX_VALUE);
     }
 
     for (int count = 0; count < crash_count; ++count) {
-      UMA_STABILITY_HISTOGRAM_ENUMERATION("Chrome.Android.Activity.CrashCounts",
-                                          activity_type,
-                                          ActivityTypeIds::ACTIVITY_MAX_VALUE);
+      UMA_STABILITY_HISTOGRAM_ENUMERATION(
+          "Chrome.Android.Activity.CrashCounts",
+          static_cast<ActivityTypeIds::Type>(activity_type),
+          ActivityTypeIds::ACTIVITY_MAX_VALUE);
     }
   }
 
   launch_counts->Clear();
   crash_counts->Clear();
 }