Change media galleries to external file system type to add toURL support

components/storage_monitor/media_storage_util.cc

 // Copyright 2014 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 "components/storage_monitor/media_storage_util.h"
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/file_util.h"
@@ skipping 98 matching lines @@
 // static
 bool MediaStorageUtil::CanCreateFileSystem(const std::string& device_id,
                                            const base::FilePath& path) {
   StorageInfo::Type type;
   if (!StorageInfo::CrackDeviceId(device_id, &type, NULL))
     return false;
 
   if (type == StorageInfo::MAC_IMAGE_CAPTURE)
     return true;
 
-  return path.IsAbsolute() && !path.ReferencesParent();
+  return !path.empty() && path.IsAbsolute() && !path.ReferencesParent();
 }
 
 // static
 void MediaStorageUtil::FilterAttachedDevices(DeviceIdSet* devices,
                                              const base::Closure& done) {
   if (BrowserThread::CurrentlyOn(BrowserThread::FILE)) {
     FilterAttachedDevicesOnFileThread(devices);
     done.Run();
     return;
   }
@@ skipping 111 matching lines @@
       StorageMonitor::GetInstance()->GetAllAvailableStorages();
   for (StorageInfoList::const_iterator it = devices.begin();
        it != devices.end(); ++it) {
     if (StorageInfo::IsRemovableDevice(id) && it->device_id() == id)
       return true;
   }
   return false;
 }
 
 }  // namespace storage_monitor