CrOS - Fix crash when pressing Enter in file browser dialog

chrome/browser/extensions/extension_file_browser_private_api.h

Index: chrome/browser/extensions/extension_file_browser_private_api.h
diff --git a/chrome/browser/extensions/extension_file_browser_private_api.h b/chrome/browser/extensions/extension_file_browser_private_api.h
index 152f5cdbf3407346dd6807a789bd4e5f9982781d..26509063d7c8cfc30ea325342415f92122fa5f7f 100644
--- a/chrome/browser/extensions/extension_file_browser_private_api.h
+++ b/chrome/browser/extensions/extension_file_browser_private_api.h
@@ -167,6 +167,9 @@ class FileDialogFunction
   // Get the callback for the hosting tab.
   const Callback& GetCallback() const;
 
+  // Remove the callback for the hosting tab.
+  void RemoveCallback();
+
  private:
   // Figure out the tab_id of the hosting tab.
   int32 GetTabId() const;