Show the eject button only for removabled and file handlers.

chrome/test/data/extensions/api_test/file_browser/mount_test/test.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.
 
 // These have to be sync'd with file_manager_private_apitest.cc
 var expectedVolume1 = {
   volumeId: 'removable:mount_path1',
   volumeLabel: 'mount_path1',
   sourcePath: 'device_path1',
   volumeType: 'removable',
   deviceType: 'usb',
   devicePath: 'system_path_prefix1',
   isParentDevice: false,
   isReadOnly: false,
   hasMedia: false,
-  profile: {profileId: "", displayName: "", isCurrentProfile: true}
+  configurable: false,
+  source: 'device',
+  profile: {profileId: "", displayName: "", isCurrentProfile: true},
 };
 
 var expectedVolume2 = {
   volumeId: 'removable:mount_path2',
   volumeLabel: 'mount_path2',
   sourcePath: 'device_path2',
   volumeType: 'removable',
   deviceType: 'mobile',
   devicePath: 'system_path_prefix2',
   isParentDevice: true,
   isReadOnly: true,
   hasMedia: true,
+  configurable: false,
+  source: 'device',
   profile: {profileId: "", displayName: "", isCurrentProfile: true}
 };
 
 var expectedVolume3 = {
   volumeId: 'removable:mount_path3',
   volumeLabel: 'mount_path3',
   sourcePath: 'device_path3',
   volumeType: 'removable',
   deviceType: 'optical',
   devicePath: 'system_path_prefix3',
   isParentDevice: true,
   isReadOnly: false,
   hasMedia: false,
+  configurable: false,
+  source: 'device',
   profile: {profileId: "", displayName: "", isCurrentProfile: true}
 };
 
 var expectedDownloadsVolume = {
   volumeId: /^downloads:Downloads[^\/]*$/,
   volumeLabel: '',
   volumeType: 'downloads',
   isReadOnly: false,
   hasMedia: false,
+  configurable: false,
+  source: 'system',
   profile: {profileId: "", displayName: "", isCurrentProfile: true}
 };
 
 var expectedDriveVolume = {
   volumeId: /^drive:drive[^\/]*$/,
   volumeLabel: '',
   sourcePath: /^\/special\/drive[^\/]*$/,
   volumeType: 'drive',
   isReadOnly: false,
   hasMedia: false,
+  configurable: false,
+  source: 'network',
   profile: {profileId: "", displayName: "", isCurrentProfile: true}
 };
 
 var expectedArchiveVolume = {
   volumeId: 'archive:archive_mount_path',
   volumeLabel: 'archive_mount_path',
   sourcePath: /removable\/mount_path3\/archive.zip$/,
   volumeType: 'archive',
   isReadOnly: true,
   hasMedia: false,
+  configurable: false,
+  source: 'file',
   profile: {profileId: "", displayName: "", isCurrentProfile: true}
 };
 
+var expectedProvidedVolume = {
+  volumeId: 'provided:',
+  volumeLabel: '',
+  volumeType: 'provided',
+  isReadOnly: true,
+  hasMedia: false,
+  configurable: true,
+  extensionId: 'testing-extension-id',
+  source: 'network',
+  mountContext: 'auto',
+  fileSystemId: '',
+  profile: {profileId: "", displayName: "", isCurrentProfile: true}

[hirono, 2015/05/14 10:43:09]

"" -> ''?

[mtomasz, 2015/05/15 02:03:38]

Done.

+};
+
 // List of expected mount points.
 // NOTE: this has to be synced with values in file_manager_private_apitest.cc
 //       and values sorted by volumeId.
 var expectedVolumeList = [
   expectedArchiveVolume,
   expectedDownloadsVolume,
   expectedDriveVolume,
+  expectedProvidedVolume,
   expectedVolume1,
   expectedVolume2,
-  expectedVolume3,
+  expectedVolume3
 ];
 
 function validateObject(received, expected, name) {
   for (var key in expected) {
     if (expected[key] instanceof RegExp) {
       if (!expected[key].test(received[key])) {
         console.warn('Expected "' + key + '" ' + name + ' property to match: ' +
                      expected[key] + ', but got: "' + received[key] + '".');
         return false;
       }
@@ skipping 39 matching lines @@
               'getMountPoints returned wrong number of mount points.');
           for (var i = 0; i < expectedVolumeList.length; i++) {
             chrome.test.assertTrue(
                 validateObject(
                     result[i], expectedVolumeList[i], 'volumeMetadata'),
                 'getMountPoints result[' + i + '] not as expected');
           }
     }));
   }
 ]);