Refactor TraceData to encapsulate internal traces' representation

telemetry/telemetry/internal/platform/profiler/trace_profiler_unittest.py

Index: telemetry/telemetry/internal/platform/profiler/trace_profiler_unittest.py
diff --git a/telemetry/telemetry/internal/platform/profiler/trace_profiler_unittest.py b/telemetry/telemetry/internal/platform/profiler/trace_profiler_unittest.py
index efacad7c0bc930caffe6b9b0f4d1d0f3e69d02ba..3e5f542db12650ebc7ff5a5157cae0329d1d27ff 100644
--- a/telemetry/telemetry/internal/platform/profiler/trace_profiler_unittest.py
+++ b/telemetry/telemetry/internal/platform/profiler/trace_profiler_unittest.py
@@ -1,11 +1,9 @@
 # Copyright 2015 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 json
 import os
 import shutil
 import tempfile
-import zipfile
 
 from telemetry.internal.platform.profiler import trace_profiler
 from telemetry.testing import tab_test_case
@@ -22,10 +20,7 @@ class TestTraceProfiler(tab_test_case.TabTestCase):
           os.path.join(out_dir, 'trace'),
           {})
       result = profiler.CollectProfile()[0]
-      self.assertTrue(zipfile.is_zipfile(result))
-      with zipfile.ZipFile(result) as z:
-        self.assertEquals(len(z.namelist()), 1)
-        with z.open(z.namelist()[0]) as f:
-          json.load(f)
+      with open(result) as f:
+        self.assertTrue(f.read())
     finally:
       shutil.rmtree(out_dir)