Launch packaged app with files on Drive on Chrome OS.

chrome/browser/chromeos/extensions/external_filesystem_apitest.cc

Index: chrome/browser/chromeos/extensions/external_filesystem_apitest.cc
diff --git a/chrome/browser/chromeos/extensions/external_filesystem_apitest.cc b/chrome/browser/chromeos/extensions/external_filesystem_apitest.cc
index 18cfa91f88a146ed880b9346599e22a60a847de6..0aeab143a1cd23c2b9335c64f4d795fbe430145e 100644
--- a/chrome/browser/chromeos/extensions/external_filesystem_apitest.cc
+++ b/chrome/browser/chromeos/extensions/external_filesystem_apitest.cc
@@ -514,4 +514,13 @@ IN_PROC_BROWSER_TEST_F(DriveFileSystemExtensionApiTest, Search) {
       FLAGS_NONE)) << message_;
 }
 
+IN_PROC_BROWSER_TEST_F(DriveFileSystemExtensionApiTest, AppFileHandler) {
+  fake_drive_service_->set_default_max_results(1);
+  EXPECT_TRUE(RunFileSystemExtensionApiTest(
+      "file_browser/handler_test_runner",
+      FILE_PATH_LITERAL("manifest_v2.json"),
+      "file_browser/app_file_handler",
+      FLAGS_USE_FILE_HANDLER)) << message_;
+}
+
 }  // namespace