********** Chromium Blob hacking

webkit/chromeos/fileapi/remote_file_system_operation.cc

Index: webkit/chromeos/fileapi/remote_file_system_operation.cc
===================================================================
--- webkit/chromeos/fileapi/remote_file_system_operation.cc	(revision 183651)
+++ webkit/chromeos/fileapi/remote_file_system_operation.cc	(working copy)
@@ -110,7 +110,7 @@
 void RemoteFileSystemOperation::Write(
     const net::URLRequestContext* url_request_context,
     const FileSystemURL& url,
-    const GURL& blob_url,
+    scoped_ptr<webkit_blob::BlobDataHandle> blob_handle,
     int64 offset,
     const WriteCallback& callback) {
   DCHECK(SetPendingOperationType(kOperationWrite));
@@ -127,8 +127,12 @@
                                                   url,
                                                   offset))));
 
+  // Use a URLRequest to read the blob data that's to be written to the file.
   scoped_ptr<net::URLRequest> blob_request(url_request_context->CreateRequest(
-      blob_url, file_writer_delegate_.get()));
+      GURL("blob://see_user_data/"), file_writer_delegate_.get()));
+  webkit_blob::BlobProtocolHandler::SetRequestedBlobDataHandle(
+      blob_request.get(),
+      blob_handle.Pass());
 
   file_writer_delegate_->Start(blob_request.Pass());
 }