[dart:io] Namespaces for file IO

runtime/bin/file_system_watcher.h

Index: runtime/bin/file_system_watcher.h
diff --git a/runtime/bin/file_system_watcher.h b/runtime/bin/file_system_watcher.h
index 929da27ee6fd1aeb4408804f601fffda54d33766..36c23d56241a779538a8d764b81b18f49ee8e6fc 100644
--- a/runtime/bin/file_system_watcher.h
+++ b/runtime/bin/file_system_watcher.h
@@ -12,6 +12,7 @@
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
+#include "bin/namespace.h"
 
 namespace dart {
 namespace bin {
@@ -39,6 +40,7 @@ class FileSystemWatcher {
   static intptr_t Init();
   static void Close(intptr_t id);
   static intptr_t WatchPath(intptr_t id,
+                            Namespace* namespc,
                             const char* path,
                             int events,
                             bool recursive);