[ew] Add basic classes.

content/public/test/test_file_system_backend.h

Index: content/public/test/test_file_system_backend.h
diff --git a/content/public/test/test_file_system_backend.h b/content/public/test/test_file_system_backend.h
index 1b0c76bc365cac71fa26c393530c3c939b81a1a0..bf683f997552f66353f309f3561c6f9674840c62 100644
--- a/content/public/test/test_file_system_backend.h
+++ b/content/public/test/test_file_system_backend.h
@@ -41,6 +41,8 @@ class TestFileSystemBackend : public fileapi::FileSystemBackend {
                           const OpenFileSystemCallback& callback) OVERRIDE;
   virtual fileapi::AsyncFileUtil* GetAsyncFileUtil(
       fileapi::FileSystemType type) OVERRIDE;
+  virtual fileapi::WatcherManager* GetWatcherManager(
+      fileapi::FileSystemType type) OVERRIDE;
   virtual fileapi::CopyOrMoveFileValidatorFactory*
       GetCopyOrMoveFileValidatorFactory(
       fileapi::FileSystemType type,
@@ -84,6 +86,7 @@ class TestFileSystemBackend : public fileapi::FileSystemBackend {
   base::FilePath base_path_;
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
   scoped_ptr<fileapi::AsyncFileUtilAdapter> file_util_;
+  scoped_ptr<fileapi::WatcherManager> watcher_manager_;
   scoped_ptr<QuotaUtil> quota_util_;
 
   bool require_copy_or_move_validator_;