[ew] Add basic classes.

webkit/browser/fileapi/file_system_backend.h

Index: webkit/browser/fileapi/file_system_backend.h
diff --git a/webkit/browser/fileapi/file_system_backend.h b/webkit/browser/fileapi/file_system_backend.h
index f6cca94b7037aef65f33f2178226645cfa336b7c..13933cfd9f60cadc989449cbb539101ea794eb46 100644
--- a/webkit/browser/fileapi/file_system_backend.h
+++ b/webkit/browser/fileapi/file_system_backend.h
@@ -33,6 +33,7 @@ class FileSystemContext;
 class FileSystemFileUtil;
 class FileSystemOperation;
 class FileSystemQuotaUtil;
+class WatcherManager;
 
 // An interface for defining a file system backend.
 //
@@ -70,6 +71,9 @@ class WEBKIT_STORAGE_BROWSER_EXPORT FileSystemBackend {
   // Returns the specialized AsyncFileUtil for this backend.
   virtual AsyncFileUtil* GetAsyncFileUtil(FileSystemType type) = 0;
 
+  // Returns the specialized WatcherManager for this backend.
+  virtual WatcherManager* GetWatcherManager(FileSystemType type) = 0;
+
   // Returns the specialized CopyOrMoveFileValidatorFactory for this backend
   // and |type|.  If |error_code| is File::FILE_OK and the result is NULL,
   // then no validator is required.