Updating Layout test analyzer to add control to show issue detail or not.

media/tools/layout_tests/test_expectations_history.py

Index: media/tools/layout_tests/test_expectations_history.py
diff --git a/media/tools/layout_tests/test_expectations_history.py b/media/tools/layout_tests/test_expectations_history.py
index 27db08bc854b11be30e7359b0375a18c47e90971..be61d4ae390a6d5aa9f7cefd11127c82e8657d15 100644
--- a/media/tools/layout_tests/test_expectations_history.py
+++ b/media/tools/layout_tests/test_expectations_history.py
@@ -4,14 +4,14 @@
 
 """A module for the history of the test expectation file."""
 
+from datetime import datetime
+from datetime import timedelta
+
 import re
 import sys
 import time
 import pysvn
 
-from datetime import datetime
-from datetime import timedelta
-
 # Default Webkit SVN location for chromium test expectation file.
 # TODO(imasaki): support multiple test expectation files.
 DEFAULT_TEST_EXPECTATION_LOCATION = (
@@ -19,7 +19,7 @@ DEFAULT_TEST_EXPECTATION_LOCATION = (
     'LayoutTests/platform/chromium/test_expectations.txt')
 
 
-class TestExpectationsHistory:
+class TestExpectationsHistory(object):
   """A class to represent history of the test expectation file.
 
   The history is obtained by calling PySVN.log()/diff() APIs.