Use mock temp file in profiler tests

Source/devtools/front_end/HeapSnapshotView.js

 /*
  * Copyright (C) 2011 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 1283 matching lines @@
         this.removeTempFile();
     },
 
     _updateSubtitle: function(value)
     {
         this.sidebarElement.subtitle = value;
     },
 
     _didCompleteSnapshotTransfer: function()
     {
+        if (!this._snapshotProxy)
+            return;
         this.sidebarElement.subtitle = Number.bytesToString(this._snapshotProxy.totalSize);
         this.sidebarElement.wait = false;
     },
 
     /**
      * @param {string} chunk
      */
     transferChunk: function(chunk)
     {
         if (!this._bufferedWriter)
@@ skipping 51 matching lines @@
         var fileOutputStream = new WebInspector.FileOutputStream();
 
         /**
          * @param {boolean} accepted
          * @this {WebInspector.HeapProfileHeader}
          */
         function onOpen(accepted)
         {
             if (!accepted)
                 return;
-            /**
-             * @param {!File} file
-             * @this {WebInspector.HeapProfileHeader}
-             */
-            function didGetFile(file)
-            {
-                if (!file) {
-                    reportTempFileError();
-                    return;
-                }
-
-                var delegate = new WebInspector.SaveSnapshotOutputStreamDelegate(this);
-                var reader = new WebInspector.ChunkedFileReader(file, 10*1000*1000, delegate)
-                reader.start(fileOutputStream);
-            }
-
-            function reportTempFileError()
-            {
+            if (this._failedToCreateTempFile) {
                 WebInspector.log("Failed to open temp file with heap snapshot",
                                  WebInspector.ConsoleMessage.MessageLevel.Error);
                 fileOutputStream.close();
-            }
-
-            if (this._failedToCreateTempFile) {
-                reportTempFileError();
             } else if (this._tempFile) {
-                this._tempFile.getFile(didGetFile.bind(this));
+                var delegate = new WebInspector.SaveSnapshotOutputStreamDelegate(this);
+                this._tempFile.writeToOutputSteam(fileOutputStream, delegate);
             } else {
                 this._onTempFileReady = onOpen.bind(this, accepted);
                 this._updateSaveProgress(0, 1);
             }
         }
         this._fileName = this._fileName || "Heap-" + new Date().toISO8601Compact() + this._profileType.fileExtension();
         fileOutputStream.open(this._fileName, onOpen.bind(this));
     },
 
     _updateSaveProgress: function(value, total)
@@ skipping 512 matching lines @@
     zeroTime: function()
     {
         return this._minimumBoundaries;
     },
 
     boundarySpan: function()
     {
         return this._maximumBoundaries - this._minimumBoundaries;
     }
 }