Implement DeleteFile and DeleteDirectory.

components/storage_monitor/test_media_transfer_protocol_manager_linux.cc

Index: components/storage_monitor/test_media_transfer_protocol_manager_linux.cc
diff --git a/components/storage_monitor/test_media_transfer_protocol_manager_linux.cc b/components/storage_monitor/test_media_transfer_protocol_manager_linux.cc
index 572c626f8b0aebef438f59a67aac774640bbbe8f..1d6cd35cdb2590cca8d354bc8b9a7b333d87fb2e 100644
--- a/components/storage_monitor/test_media_transfer_protocol_manager_linux.cc
+++ b/components/storage_monitor/test_media_transfer_protocol_manager_linux.cc
@@ -75,4 +75,18 @@ void TestMediaTransferProtocolManagerLinux::CopyFileFromLocal(
   callback.Run(true /* error */);
 }
 
+void TestMediaTransferProtocolManagerLinux::ReadDirectoryEntryIds(
+    const std::string& storage_handle,
+    const uint32 file_id,
+    const ReadDirectoryEntryIdsCallback& callback) {
+  callback.Run(std::vector<uint32>(), true /* error */);
+}
+
+void TestMediaTransferProtocolManagerLinux::DeleteObject(
+    const std::string& storage_handle,
+    const uint32 object_id,
+    const DeleteObjectCallback& callback) {
+  callback.Run(true /* error */);
+}
+
 }  // namespace storage_monitor