[Android] Do not list tests without logs in 'Detailed Logs' section.

TEST=python base_test_result_unittest.py
BUG=

Review URL: https://codereview.chromium.org/13081002

git-svn-id: http://src.chromium.org/svn/trunk/src/build@190705 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

android/pylib/base/base_test_result.py

@@ -73,8 +73,10 @@ class TestRunResults(object):
     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):

android/pylib/base/base_test_result_unittest.py

@@ -53,8 +53,7 @@ class TestTestRunResults(unittest.TestCase):
     log_print = ('[FAIL] f1:\n'
                  'failure1\n'
                  '[CRASH] c1:\n'
-                 'crash1\n'
-                 '[UNKNOWN] u1:\n')
+                 'crash1')
     self.assertEqual(self.tr.GetLogs(), log_print)
 
   def testGetShortForm(self):