[telemetry] More fixes for my page_test_result rewrite

tools/perf/perf_tools/skpicture_printer_unittest.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 import os
 import tempfile
 import shutil
 
 from telemetry import multi_page_benchmark_unittest_base
 from telemetry import options_for_unittests
@@ skipping 14 matching lines @@
 
   def testPrintToSkPicture(self):
     ps = self.CreatePageSetFromFileInUnittestDataDir('non_scrollable_page.html')
     printer = skpicture_printer.SkPicturePrinter()
     all_results = self.RunBenchmark(printer, ps, options=self._options)
 
     self.assertEqual(0, len(all_results.page_failures))
     self.assertEqual(1, len(all_results.page_results))
     results0 = all_results.page_results[0]
 
-    outdir = results0['output_path']
+    outdir = results0['output_path'].value
     self.assertTrue('non_scrollable_page_html' in outdir)
     self.assertTrue(os.path.isdir(outdir))
     self.assertEqual(['layer_0.skp'], os.listdir(outdir))
 
     skp_file = os.path.join(outdir, 'layer_0.skp')
     self.assertTrue(os.path.isfile(skp_file))
     self.assertTrue(os.path.getsize(skp_file) > 0)