Clean up a few more unused globals.

chrome/browser/google_apis/drive_api_requests.cc

 // Copyright (c) 2012 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/google_apis/drive_api_requests.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/json/json_writer.h"
 #include "base/location.h"
 #include "base/task_runner_util.h"
 #include "base/values.h"
 #include "chrome/browser/google_apis/drive_api_parser.h"
 #include "chrome/browser/google_apis/request_sender.h"
 #include "chrome/browser/google_apis/request_util.h"
 #include "chrome/browser/google_apis/time_util.h"
 #include "net/base/url_util.h"
 
 namespace google_apis {
 namespace {
 
 const char kContentTypeApplicationJson[] = "application/json";
-const char kDirectoryMimeType[] = "application/vnd.google-apps.folder";
 const char kParentLinkKind[] = "drive#fileLink";
 
 // Parses the JSON value to a resource typed |T| and runs |callback| on the UI
 // thread once parsing is done.
 template<typename T>
 void ParseJsonAndRun(
     const base::Callback<void(GDataErrorCode, scoped_ptr<T>)>& callback,
     GDataErrorCode error,
     scoped_ptr<base::Value> value) {
   DCHECK(!callback.is_null());
@@ skipping 672 matching lines @@
           progress_callback,
           url_generator.GenerateDownloadFileUrl(resource_id),
           output_file_path) {
 }
 
 DownloadFileRequest::~DownloadFileRequest() {
 }
 
 }  // namespace drive
 }  // namespace google_apis