Site Settings Android: Add UMA for the Autoplay.

components/content_settings/core/browser/content_settings_default_provider.cc

Index: components/content_settings/core/browser/content_settings_default_provider.cc
diff --git a/components/content_settings/core/browser/content_settings_default_provider.cc b/components/content_settings/core/browser/content_settings_default_provider.cc
index ea45f6f6d4b707b7144a3baed774abef42411258..1d4af86fdca6fcb07b7e5b997387ef2cefec9e9c 100644
--- a/components/content_settings/core/browser/content_settings_default_provider.cc
+++ b/components/content_settings/core/browser/content_settings_default_provider.cc
@@ -192,6 +192,11 @@ DefaultProvider::DefaultProvider(PrefService* prefs, bool incognito)
       IntToContentSetting(prefs_->GetInteger(
           GetPrefName(CONTENT_SETTINGS_TYPE_BLUETOOTH_GUARD))),
       CONTENT_SETTING_NUM_SETTINGS);
+  UMA_HISTOGRAM_ENUMERATION(
+      "ContentSettings.DefaultAutoplaySetting",
+      IntToContentSetting(prefs_->GetInteger(
+          GetPrefName(CONTENT_SETTINGS_TYPE_AUTOPLAY))),
+      CONTENT_SETTING_NUM_SETTINGS);
 #endif
   pref_change_registrar_.Init(prefs_);
   PrefChangeRegistrar::NamedChangeCallback callback = base::Bind(