mediaview: Enable by default.

chrome/browser/chromeos/arc/fileapi/arc_media_view_util.cc

 // Copyright 2017 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/chromeos/arc/fileapi/arc_media_view_util.h"
 
 namespace arc {
 
 namespace {
 
 constexpr char kMediaViewVolumeIdPrefix[] = "media_view:";
 
 }  // namespace
 
 const base::Feature kMediaViewFeature{"ArcMediaView",
-                                      base::FEATURE_DISABLED_BY_DEFAULT};
+                                      base::FEATURE_ENABLED_BY_DEFAULT};
 
 const char kMediaDocumentsProviderAuthority[] =
     "com.android.providers.media.documents";
 
 const char kImagesRootDocumentId[] = "images_root";
 const char kVideosRootDocumentId[] = "videos_root";
 const char kAudioRootDocumentId[] = "audio_root";
 
 std::string GetMediaViewVolumeId(const std::string& root_document_id) {
   return std::string(kMediaViewVolumeIdPrefix) + root_document_id;
 }
 
 }  // namespace arc