DevTools: fix race conditions while recording film strips

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 280 matching lines @@
         var callsPendingOpen = this._callsPendingOpen;
         this._callsPendingOpen = null;
         for (var i = 0; i < callsPendingOpen.length; ++i)
             callsPendingOpen[i]();
         if (this._chunks.length)
             this._writeNextChunk();
     },
 
     _writeNextChunk: function()
     {
+        // File was deleted while create or write was in-flight.
+        if (!this._tempFile)
+            return;
         var chunk = this._chunks.shift();
         this._isWriting = true;
         this._tempFile.write(/** @type {!Array.<string>} */(chunk.strings), this._didWriteChunk.bind(this, chunk.callback));
     },
 
     /**
      * @param {?function(number)} callback
      * @param {number} size
      */
     _didWriteChunk: function(callback, size)
@@ skipping 272 matching lines @@
 
     /**
      * @param {!WebInspector.OutputStream} outputStream
      * @param {!WebInspector.OutputStreamDelegate} delegate
      */
     writeToStream: function(outputStream, delegate)
     {
         this._file.writeToOutputStream(outputStream, delegate);
     }
 }