DevTools: fix 'Failed to write into a temp file' when recording a filmstrip

Source/devtools/front_end/bindings/TempFile.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 364 matching lines @@
     },
 
     remove: function()
     {
         if (this._callsPendingOpen) {
             this._callsPendingOpen.push(this.remove.bind(this));
             return;
         }
         if (this._tempFile)
             this._tempFile.remove();
+        this._tempFile = null;
     }
 }
 
 /**
  * @param {function(?)} fulfill
  * @param {function(*)} reject
  */
 WebInspector.TempFile._clearTempStorage = function(fulfill, reject)
 {
     /**
@@ skipping 187 matching lines @@
 
     /**
      * @param {!WebInspector.OutputStream} outputStream
      * @param {!WebInspector.OutputStreamDelegate} delegate
      */
     writeToStream: function(outputStream, delegate)
     {
         this._file.writeToOutputStream(outputStream, delegate);
     }
 }