Rename the drive: scheme with the externalfile: scheme.

chrome/browser/chromeos/fileapi/external_file_protocol_handler.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/chromeos/fileapi/external_file_protocol_handler.h"
+
+#include "base/logging.h"
+#include "chrome/browser/chromeos/fileapi/external_file_url_request_job.h"
+#include "net/url_request/url_request.h"
+#include "url/gurl.h"
+
+namespace chromeos {
+
+ExternalFileProtocolHandler::ExternalFileProtocolHandler(void* profile_id)
+    : profile_id_(profile_id) {
+}
+
+ExternalFileProtocolHandler::~ExternalFileProtocolHandler() {
+}
+
+net::URLRequestJob* ExternalFileProtocolHandler::MaybeCreateJob(
+    net::URLRequest* request,
+    net::NetworkDelegate* network_delegate) const {
+  DVLOG(1) << "Handling url: " << request->url().spec();
+  return new ExternalFileURLRequestJob(profile_id_, request, network_delegate);
+}
+
+}  // namespace chromeos