[Android] Do not list tests wihtout logs in 'Detailed Logs' section.

build/android/pylib/base/base_test_result.py

 # Copyright (c) 2013 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.
 
 """Module containing base test results classes."""
 
 
 class ResultType(object):
   """Class enumerating test types."""
   PASS = 'PASS'
@@ skipping 55 matching lines @@
   """Set of results for a test run."""
   def __init__(self):
     self._results = set()
 
   def GetLogs(self):
     """Get the string representation of all test logs."""
     s = []
     for test_type in ResultType.GetTypes():
       if test_type != ResultType.PASS:
         for t in sorted(self._GetType(test_type)):
-          s.append('[%s] %s:' % (test_type, t))
-          s.append(t.GetLog())
+          log = t.GetLog()
+          if log:
+            s.append('[%s] %s:' % (test_type, t))
+            s.append(log)
     return '\n'.join(s)
 
   def GetLongForm(self):
     """Get the long string representation of this object."""
     s = []
     s.append('ALL (%d tests)' % len(self._results))
     for test_type in ResultType.GetTypes():
       tests = sorted(self._GetType(test_type))
       if test_type == ResultType.PASS:
         s.append('%s (%d tests)' % (test_type, len(tests)))
@@ skipping 68 matching lines @@
     """Get the set of all unknown test results."""
     return self._GetType(ResultType.UNKNOWN)
 
   def GetNotPass(self):
     """Get the set of all non-passed test results."""
     return self.GetAll() - self.GetPass()
 
   def DidRunPass(self):
     """Return whether the test run was successful."""
     return not self.GetNotPass()