Bug 1086684 - Stash the full path for file inputs to avoid doing IPC at inopportune times. r=ehsan/bent/gps

dom/html/HTMLInputElement.h

@@ -1254,6 +1254,7 @@ protected:
      */
     nsTextEditorState*       mState;
   } mInputData;
+
   /**
    * The value of the input if it is a file input. This is the list of filenames
    * used when uploading a file. It is vital that this is kept separate from
@@ -1266,6 +1267,13 @@ protected:
    */
   nsTArray<nsRefPtr<File>> mFiles;
 
+#ifndef MOZ_CHILD_PERMISSIONS
+  /**
+   * Hack for bug 1086684: Stash the .value when we're a file picker.
+   */
+  nsString mFirstFilePath;
+#endif
+
   nsRefPtr<FileList>  mFileList;
 
   nsRefPtr<DirPickerFileListBuilderTask> mDirPickerFileListBuilderTask;