[test] Return variant and random seed on failures.

tools/testrunner/objects/testcase.py

Index: tools/testrunner/objects/testcase.py
diff --git a/tools/testrunner/objects/testcase.py b/tools/testrunner/objects/testcase.py
index c7b445eaab4cec73bbc90dc3660b7bc6c84abac9..0ab06361b178546c232f4883bd57d28dd1e53f07 100644
--- a/tools/testrunner/objects/testcase.py
+++ b/tools/testrunner/objects/testcase.py
@@ -29,10 +29,12 @@
 from . import output
 
 class TestCase(object):
-  def __init__(self, suite, path, flags=None, dependency=None):
+  def __init__(self, suite, path, variant='default', flags=None,
+               dependency=None):
     self.suite = suite        # TestSuite object
     self.path = path          # string, e.g. 'div-mod', 'test-api/foo'
     self.flags = flags or []  # list of strings, flags specific to this test
+    self.variant = variant    # name of the used testing variant
     self.dependency = dependency  # |path| for testcase that must be run first
     self.outcomes = set([])
     self.output = None
@@ -40,8 +42,9 @@ class TestCase(object):
     self.duration = None  # assigned during execution
     self.run = 1  # The nth time this test is executed.
 
-  def CopyAddingFlags(self, flags):
-    copy = TestCase(self.suite, self.path, self.flags + flags, self.dependency)
+  def CopyAddingFlags(self, variant, flags):
+    copy = TestCase(self.suite, self.path, variant, self.flags + flags,
+                    self.dependency)
     copy.outcomes = self.outcomes
     return copy
 
@@ -51,16 +54,16 @@ class TestCase(object):
     and returns them as a JSON serializable object.
     """
     assert self.id is not None
-    return [self.suitename(), self.path, self.flags,
+    return [self.suitename(), self.path, self.variant, self.flags,
             self.dependency, list(self.outcomes or []), self.id]
 
   @staticmethod
   def UnpackTask(task):
     """Creates a new TestCase object based on packed task data."""
     # For the order of the fields, refer to PackTask() above.
-    test = TestCase(str(task[0]), task[1], task[2], task[3])
-    test.outcomes = set(task[4])
-    test.id = task[5]
+    test = TestCase(str(task[0]), task[1], task[2], task[3], task[4])
+    test.outcomes = set(task[5])
+    test.id = task[6]
     test.run = 1
     return test