Enable browser tests for ChromeOS.

chrome/browser/extensions/api/sync_file_system/sync_file_system_apitest.cc

Index: chrome/browser/extensions/api/sync_file_system/sync_file_system_apitest.cc
diff --git a/chrome/browser/extensions/api/sync_file_system/sync_file_system_apitest.cc b/chrome/browser/extensions/api/sync_file_system/sync_file_system_apitest.cc
index e645d86b3e33d42782e6619156f21af690b09dca..0052d33319d2b1c3e62c705a864ab143dd096865 100644
--- a/chrome/browser/extensions/api/sync_file_system/sync_file_system_apitest.cc
+++ b/chrome/browser/extensions/api/sync_file_system/sync_file_system_apitest.cc
@@ -101,10 +101,6 @@ ACTION_P5(ReturnWithFakeFileAddedStatus,
 
 }  // namespace
 
-// TODO(calvinlo): Add Chrome OS support for syncable file system
-// (http://crbug.com/160693)
-#if !defined(OS_CHROMEOS)
-
 IN_PROC_BROWSER_TEST_F(SyncFileSystemApiTest, DeleteFileSystem) {
   ASSERT_TRUE(RunPlatformAppTest("sync_file_system/delete_file_system"))
       << message_;
@@ -178,6 +174,4 @@ IN_PROC_BROWSER_TEST_F(SyncFileSystemApiTest, ConflictResolutionPolicy) {
       << message_;
 }
 
-#endif  // !defined(OS_CHROMEOS)
-
 }  // namespace chrome