Adding file access permissions to fileBrowserHandler manifest.

chrome/browser/chromeos/extensions/external_filesystem_apitest.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 "base/file_util.h"
 #include "base/platform_file.h"
 #include "base/path_service.h"
 #include "base/scoped_temp_dir.h"
 #include "base/stringprintf.h"
 #include "chrome/browser/chromeos/gdata/gdata_file_system_proxy.h"
@@ skipping 181 matching lines @@
 }
 
 IN_PROC_BROWSER_TEST_F(FileSystemExtensionApiTest, FileBrowserTestWrite) {
   AddTmpMountPoint();
   ASSERT_TRUE(RunExtensionTest("filesystem_handler_write")) << message_;
   ASSERT_TRUE(RunExtensionSubtest(
       "filebrowser_component", "write.html", kComponentFlags)) << message_;
 }
 
 IN_PROC_BROWSER_TEST_F(FileSystemExtensionApiTest,
+                       FileBrowserTestWriteReadOnly) {
+  AddTmpMountPoint();
+  ASSERT_TRUE(RunExtensionTest("filesystem_handler_write")) << message_;
+  ASSERT_FALSE(RunExtensionSubtest(
+      "filebrowser_component", "write.html#def", kComponentFlags)) << message_;
+}
+
+IN_PROC_BROWSER_TEST_F(FileSystemExtensionApiTest,
                        FileBrowserTestWriteComponent) {
   AddTmpMountPoint();
   ASSERT_TRUE(RunComponentExtensionTest("filesystem_handler_write"))
       << message_;
   ASSERT_TRUE(RunExtensionSubtest(
       "filebrowser_component", "write.html", kComponentFlags)) << message_;
 }
 
 IN_PROC_BROWSER_TEST_F(RemoteFileSystemExtensionApiTest, RemoteMountPoint) {
   AddTmpMountPoint();
@@ skipping 20 matching lines @@
       .WillOnce(MockCreateSnapshotFile(
           base::PLATFORM_FILE_OK,
           test_file_info_,
           // Returns the path to the temporary file on the local drive.
           test_file_path_,
           scoped_refptr<webkit_blob::ShareableFileReference>(NULL)));
   ASSERT_TRUE(RunExtensionSubtest(
       "filebrowser_component", "remote.html#" + GetPathOnMountPoint(""),
       kComponentFlags)) << message_;
 }