[CrosDisksClient] Determine device type from DeviceMediaType property sent by cros-disks.

chrome/browser/resources/file_manager/js/file_manager.js

 // Copyright (c) 2012 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.
 
 // Setting the src of an img to an empty string can crash the browser, so we
 // use an empty 1x1 gif instead.
 const EMPTY_IMAGE_URI = 'data:image/gif;base64,'
         + 'R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw%3D%3D';
 
 /**
@@ skipping 2139 matching lines @@
    */
   FileManager.prototype.maybeRenderFormattingTask_ = function(selection) {
     // Not to make unnecessary getMountPoints() call we doublecheck if there is
     // only one selected entry.
     if (selection.entries.length != 1)
       return;
     var self = this;
     function onMountPointsFound(mountPoints) {
       self.mountPoints_ = mountPoints;
       function onVolumeMetadataFound(volumeMetadata) {
-        if (volumeMetadata.deviceType == "flash") {
+        if (volumeMetadata.deviceType == "usb" ||
+            volumeMetadata.deviceType == "sd") {
           if (self.selection.entries.length != 1 ||
               normalizeAbsolutePath(self.selection.entries[0].fullPath) !=
               normalizeAbsolutePath(volumeMetadata.mountPath)) {
             return;
           }
           var task = {
             taskId: self.getExtensionId_() + '|format-device',
             iconUrl: chrome.extension.getURL('images/filetype_generic.png'),
             title: str('FORMAT_DEVICE'),
             internal: true
@@ skipping 1513 matching lines @@
           });
       }, onError);
 
       function onError(err) {
         console.log('Error while checking free space: ' + err);
         setTimeout(doCheck, 1000 * 60);
       }
     }
   }
 })();