Re-enable MetricsServiceTest.RegisterSyntheticTrial.

chrome/browser/metrics/metrics_service_unittest.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/metrics/metrics_service.h"
 
 #include <ctype.h>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 248 matching lines @@
   EXPECT_TRUE(uma_log.has_system_profile());
   EXPECT_EQ(0, uma_log.user_action_event_size());
   EXPECT_EQ(0, uma_log.omnibox_event_size());
   EXPECT_EQ(0, uma_log.histogram_event_size());
   EXPECT_EQ(0, uma_log.profiler_event_size());
   EXPECT_EQ(0, uma_log.perf_data_size());
 
   EXPECT_EQ(1, uma_log.system_profile().stability().crash_count());
 }
 
-// Crashes on at least Mac and Linux.  http://crbug.com/320433
-TEST_F(MetricsServiceTest, DISABLED_RegisterSyntheticTrial) {
+TEST_F(MetricsServiceTest, RegisterSyntheticTrial) {
   MetricsService service;
 
   // Add two synthetic trials and confirm that they show up in the list.
   SyntheticTrialGroup trial1(metrics::HashName("TestTrial1"),
                              metrics::HashName("Group1"),
                              base::TimeTicks::Now());
   service.RegisterSyntheticFieldTrial(trial1);
 
   SyntheticTrialGroup trial2(metrics::HashName("TestTrial2"),
                              metrics::HashName("Group2"),
@@ skipping 31 matching lines @@
   service.log_manager_.FinishCurrentLog();
   service.log_manager_.BeginLoggingWithLog(new MetricsLog("clientID", 1),
                                            MetricsLog::ONGOING_LOG);
   service.GetCurrentSyntheticFieldTrials(&synthetic_trials);
   EXPECT_EQ(3U, synthetic_trials.size());
   EXPECT_TRUE(HasSyntheticTrial(synthetic_trials, "TestTrial1", "Group2"));
   EXPECT_TRUE(HasSyntheticTrial(synthetic_trials, "TestTrial2", "Group2"));
   EXPECT_TRUE(HasSyntheticTrial(synthetic_trials, "TestTrial3", "Group3"));
   service.log_manager_.FinishCurrentLog();
 }