Don't show hidden devices in UI (exept from imageburner).

chrome/browser/extensions/extension_file_browser_private_apitest.cc

 // Copyright (c) 2011 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 <stdio.h>
 
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/cros/mock_mount_library.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 43 matching lines @@
                                              "file_path1",
                                              "device_label1",
                                              "drive_label1",
                                              "parent_path1",
                                              "system_path_prefix1",
                                              chromeos::FLASH,
                                              1073741824,
                                              false,
                                              false,
                                              false,
+                                             false,
                                              false)));
     volumes_.insert(
         std::pair<std::string, chromeos::MountLibrary::Disk*>(
             "device_path2",
             new chromeos::MountLibrary::Disk("device_path2",
                                              "/media/removable/mount_path2",
                                              "system_path2",
                                              "file_path2",
                                              "device_label2",
                                              "drive_label2",
                                              "parent_path2",
                                              "system_path_prefix2",
                                              chromeos::HDD,
                                              47723,
                                              true,
                                              true,
                                              true,
-                                             true)));
+                                             true,
+                                             false)));
     volumes_.insert(
         std::pair<std::string, chromeos::MountLibrary::Disk*>(
             "device_path3",
             new chromeos::MountLibrary::Disk("device_path3",
                                              "/media/removable/mount_path3",
                                              "system_path3",
                                              "file_path3",
                                              "device_label3",
                                              "drive_label3",
                                              "parent_path3",
                                              "system_path_prefix3",
                                              chromeos::OPTICAL,
                                              0,
                                              true,
                                              false,
                                              false,
-                                             true)));
+                                             true,
+                                             false)));
   }
 
   void DeleteVolumeMap() {
     for (chromeos::MountLibrary::DiskMap::iterator it = volumes_.begin();
          it != volumes_.end();
          ++it) {
       delete it->second;
     }
     volumes_.clear();
   }
@@ skipping 14 matching lines @@
       .Times(0);
   EXPECT_CALL(mount_library_mock_, UnmountPath(StrEq("/tmp/test_file.zip")))
       .Times(1);
 
   EXPECT_CALL(mount_library_mock_, disks())
       .WillRepeatedly(ReturnRef(volumes_));
 
   ASSERT_TRUE(RunComponentExtensionTest("filebrowser_mount"))  << message_;
 }