Add a has_media flag to VolumeMetadata.

chrome/browser/chromeos/file_manager/volume_manager.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_FILE_MANAGER_VOLUME_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_MANAGER_VOLUME_MANAGER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 89 matching lines @@
   // Label for the volume if the volume is either removable or a provided
   // file system. In case of removables, if disk is a parent, then its label,
   // else parents label (e.g. "TransMemory").
   std::string volume_label;
 
   // Is the device is a parent device (i.e. sdb rather than sdb1).
   bool is_parent;
 
   // True if the volume is read only.
   bool is_read_only;
+
+  // True if the volume contains media.
+  bool has_media;
 };
 
 // Manages "Volume"s for file manager. Here are "Volume"s.
 // - Drive File System (not yet supported).
 // - Downloads directory.
 // - Removable disks (volume will be created for each partition, not only one
 //   for a device).
 // - Mounted zip archives.
 class VolumeManager : public KeyedService,
                       public drive::DriveIntegrationServiceObserver,
@@ skipping 104 matching lines @@
 
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<VolumeManager> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(VolumeManager);
 };
 
 }  // namespace file_manager
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_MANAGER_VOLUME_MANAGER_H_