Revert of Fix regression in memory-infra bots due to change in dump order

base/trace_event/memory_dump_manager_unittest.cc

 // Copyright 2015 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 "base/trace_event/memory_dump_manager.h"
 
 #include "base/bind_helpers.h"
 #include "base/memory/scoped_vector.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 699 matching lines @@
 
   EnableTracingWithTraceConfig(
       TraceConfigMemoryTestUtil::GetTraceConfig_PeriodicTriggers(
           kLightDumpPeriodMs, kHeavyDumpPeriodMs));
   run_loop.Run();
   DisableTracing();
 }
 
 // Tests against race conditions that might arise when disabling tracing in the
 // middle of a global memory dump.
-// TODO(ssid): Enable this test once crbug.com/555584 is fixed.
-TEST_F(MemoryDumpManagerTest, DISABLED_DisableTracingWhileDumping) {
+TEST_F(MemoryDumpManagerTest, DisableTracingWhileDumping) {
   base::WaitableEvent tracing_disabled_event(false, false);
   InitializeMemoryDumpManager(false /* is_coordinator */);
 
   // Register a bound dump provider.
   scoped_ptr<Thread> mdp_thread(new Thread("test thread"));
   mdp_thread->Start();
   MockMemoryDumpProvider mdp_with_affinity;
   RegisterDumpProvider(&mdp_with_affinity, mdp_thread->task_runner(),
                        kDefaultOptions);
 
@@ skipping 87 matching lines @@
   ASSERT_EQ(1u, trace_analyzer::CountMatches(events, Query::EventPidIs(123)));
   ASSERT_EQ(1u, trace_analyzer::CountMatches(events, Query::EventPidIs(456)));
   ASSERT_EQ(1u, trace_analyzer::CountMatches(
                     events, Query::EventPidIs(GetCurrentProcId())));
   ASSERT_EQ(events[0]->id, events[1]->id);
   ASSERT_EQ(events[0]->id, events[2]->id);
 }
 
 }  // namespace trace_event
 }  // namespace base