mediaview: Implement UI.

ui/file_manager/file_manager/common/js/util.js

Index: ui/file_manager/file_manager/common/js/util.js
diff --git a/ui/file_manager/file_manager/common/js/util.js b/ui/file_manager/file_manager/common/js/util.js
index f5a0455729d33f3a55142f9127cdaa790a276f56..d7b0b83403ee0263ef7c8d6cf4bd9789c1180a19 100644
--- a/ui/file_manager/file_manager/common/js/util.js
+++ b/ui/file_manager/file_manager/common/js/util.js
@@ -940,6 +940,20 @@ util.getRootTypeLabel = function(locationInfo) {
       return str('DRIVE_SHARED_WITH_ME_COLLECTION_LABEL');
     case VolumeManagerCommon.RootType.DRIVE_RECENT:
       return str('DRIVE_RECENT_COLLECTION_LABEL');
+    case VolumeManagerCommon.RootType.MEDIA_VIEW:
+      var mediaViewRootType =
+          VolumeManagerCommon.getMediaViewRootTypeFromVolumeId(
+              locationInfo.volumeInfo.volumeId);
+      switch (mediaViewRootType) {
+        case VolumeManagerCommon.MediaViewRootType.IMAGES:
+          return str('MEDIA_VIEW_IMAGES_ROOT_LABEL');
+        case VolumeManagerCommon.MediaViewRootType.VIDEOS:
+          return str('MEDIA_VIEW_VIDEOS_ROOT_LABEL');
+        case VolumeManagerCommon.MediaViewRootType.AUDIO:
+          return str('MEDIA_VIEW_AUDIO_ROOT_LABEL');
+      }
+      console.error('Unsupported media view root type: ' + mediaViewRootType);
+      return locationInfo.volumeInfo.label;
     case VolumeManagerCommon.RootType.DRIVE_OTHER:
     case VolumeManagerCommon.RootType.ARCHIVE:
     case VolumeManagerCommon.RootType.REMOVABLE: