[ew] Add basic classes.

webkit/browser/fileapi/file_system_context.h

Index: webkit/browser/fileapi/file_system_context.h
diff --git a/webkit/browser/fileapi/file_system_context.h b/webkit/browser/fileapi/file_system_context.h
index f8b9b52ba99c6a90262be5252c5fe420c8569b8a..d9c1c4576bafd12afddce5cb26e50a7b1aa646a1 100644
--- a/webkit/browser/fileapi/file_system_context.h
+++ b/webkit/browser/fileapi/file_system_context.h
@@ -65,6 +65,7 @@ class IsolatedFileSystemBackend;
 class MountPoints;
 class QuotaReservation;
 class SandboxFileSystemBackend;
+class WatchManager;
 
 struct DefaultContextDeleter;
 struct FileSystemInfo;
@@ -163,6 +164,10 @@ class STORAGE_EXPORT FileSystemContext
   FileSystemBackend* GetFileSystemBackend(
       FileSystemType type) const;
 
+  // Returns the watcher manager for the given |type|.
+  // This may return NULL if the type does not support watching.
+  WatcherManager* GetWatcherManager(FileSystemType type) const;
+
   // Returns true for sandboxed filesystems. Currently this does
   // the same as GetQuotaUtil(type) != NULL. (In an assumption that
   // all sandboxed filesystems must cooperate with QuotaManager so that