[fsp] Add support for creating directories.

chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_apitest.cc

Index: chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_apitest.cc
diff --git a/chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_apitest.cc b/chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_apitest.cc
index 06ccfa013f40d11486c5924da005500fe1fbeb50..f08da40f6f51e04ddbcc1a451c044907a7d550ef 100644
--- a/chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_apitest.cc
+++ b/chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_apitest.cc
@@ -74,4 +74,10 @@ IN_PROC_BROWSER_TEST_F(FileSystemProviderApiTest, MimeType) {
       << message_;
 }
 
+IN_PROC_BROWSER_TEST_F(FileSystemProviderApiTest, CreateDirectory) {
+  ASSERT_TRUE(RunPlatformAppTestWithFlags(
+      "file_system_provider/create_directory", kFlagLoadAsComponent))
+      << message_;
+}
+
 }  // namespace extensions