Show the eject button only for removabled and file handlers.

chrome/browser/chromeos/extensions/file_manager/file_manager_private_apitest.cc

Index: chrome/browser/chromeos/extensions/file_manager/file_manager_private_apitest.cc
diff --git a/chrome/browser/chromeos/extensions/file_manager/file_manager_private_apitest.cc b/chrome/browser/chromeos/extensions/file_manager/file_manager_private_apitest.cc
index 32523c1315b6f43bd7c818eeba086aa309fcd022..3653a7f59d73fb5f2be0447276371601b2c30748 100644
--- a/chrome/browser/chromeos/extensions/file_manager/file_manager_private_apitest.cc
+++ b/chrome/browser/chromeos/extensions/file_manager/file_manager_private_apitest.cc
@@ -8,7 +8,9 @@
 #include "chrome/browser/chromeos/extensions/file_manager/event_router.h"
 #include "chrome/browser/chromeos/file_manager/drive_test_util.h"
 #include "chrome/browser/chromeos/file_manager/file_watcher.h"
+#include "chrome/browser/chromeos/file_system_provider/provided_file_system_info.h"
 #include "chrome/browser/extensions/extension_apitest.h"
+#include "chrome/common/extensions/api/file_system_provider_capabilities/file_system_provider_capabilities_handler.h"
 #include "chrome/test/base/testing_profile.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "chromeos/dbus/cros_disks_client.h"
@@ -311,6 +313,17 @@ IN_PROC_BROWSER_TEST_F(FileManagerPrivateApiTest, Mount) {
   file_manager::test_util::WaitUntilDriveMountPointIsAdded(
       browser()->profile());
 
+  // Add a provided file system, to test passing the |configurable| and
+  // |source| flags properly down to Files app.
+  chromeos::file_system_provider::ProvidedFileSystemInfo info(
+      "testing-extension-id", chromeos::file_system_provider::MountOptions(),
+      base::FilePath(), true /* configurable */, extensions::SOURCE_NETWORK);
+
+  file_manager::VolumeManager::Get(browser()->profile())
+      ->AddVolumeForTesting(
+          make_linked_ptr(file_manager::Volume::CreateForProvidedFileSystem(
+              info, file_manager::MOUNT_CONTEXT_AUTO)));
+
   // We will call fileManagerPrivate.unmountVolume once. To test that method, we
   // check that UnmountPath is really called with the same value.
   EXPECT_CALL(*disk_mount_manager_mock_, UnmountPath(_, _, _))