[fsp] Fix flaky browser test for aborting a write operation.

chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_apitest.cc

 // Copyright 2013 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/extensions/extension_apitest.h"
 
 namespace extensions {
 
 class FileSystemProviderApiTest : public ExtensionApiTest {
  public:
@@ skipping 96 matching lines @@
                                           kFlagLoadAsComponent))
       << message_;
 }
 
 IN_PROC_BROWSER_TEST_F(FileSystemProviderApiTest, Truncate) {
   ASSERT_TRUE(RunPlatformAppTestWithFlags("file_system_provider/truncate",
                                           kFlagLoadAsComponent))
       << message_;
 }
 
-// http://crbug.com/426549
-#if defined(OS_CHROMEOS)
-#define MAYBE_WriteFile DISABLED_WriteFile
-#else
-#define MAYBE_WriteFile WriteFile
-#endif
-IN_PROC_BROWSER_TEST_F(FileSystemProviderApiTest, MAYBE_WriteFile) {
+IN_PROC_BROWSER_TEST_F(FileSystemProviderApiTest, WriteFile) {
   ASSERT_TRUE(RunPlatformAppTestWithFlags("file_system_provider/write_file",
                                           kFlagLoadAsComponent))
       << message_;
 }
 
 IN_PROC_BROWSER_TEST_F(FileSystemProviderApiTest, Extension) {
   ASSERT_TRUE(RunComponentExtensionTest("file_system_provider/extension"))
       << message_;
 }
 
 IN_PROC_BROWSER_TEST_F(FileSystemProviderApiTest, Thumbnail) {
   ASSERT_TRUE(RunPlatformAppTestWithFlags("file_system_provider/thumbnail",
                                           kFlagLoadAsComponent))
       << message_;
 }
 
 // TODO(mtomasz): Add a test for Notify() once it's wired to
 // chrome.fileManagerPrivate.
 
 }  // namespace extensions