Implement Dump-on-DCHECK (via a new LogSeverity).

base/task/cancelable_task_tracker_unittest.cc

 // Copyright 2014 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/task/cancelable_task_tracker.h"
 
 #include <cstddef>
 #include <deque>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
+#include "base/test/gtest_util.h"
 #include "base/test/test_simple_task_runner.h"
 #include "base/threading/thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 
 namespace {
 
 class CancelableTaskTrackerTest : public testing::Test {
  protected:
@@ skipping 313 matching lines @@
   CancelableTaskTrackerDeathTest() {
     // The default style "fast" does not support multi-threaded tests.
     ::testing::FLAGS_gtest_death_test_style = "threadsafe";
   }
 };
 
 // Runs |fn| with |task_tracker|, expecting it to crash in debug mode.
 void MaybeRunDeadlyTaskTrackerMemberFunction(
     CancelableTaskTracker* task_tracker,
     const Callback<void(CancelableTaskTracker*)>& fn) {
-// CancelableTask uses DCHECKs with its ThreadChecker (itself only
-// enabled in debug mode).
-#if DCHECK_IS_ON()
-  EXPECT_DEATH_IF_SUPPORTED(fn.Run(task_tracker), "");
-#endif
+  EXPECT_DCHECK_DEATH(fn.Run(task_tracker));
 }
 
 void PostDoNothingTask(CancelableTaskTracker* task_tracker) {
   ignore_result(task_tracker->PostTask(
       scoped_refptr<TestSimpleTaskRunner>(new TestSimpleTaskRunner()).get(),
       FROM_HERE,
       Bind(&DoNothing)));
 }
 
 TEST_F(CancelableTaskTrackerDeathTest, PostFromDifferentThread) {
@@ skipping 41 matching lines @@
 
   bad_thread.task_runner()->PostTask(
       FROM_HERE,
       Bind(&MaybeRunDeadlyTaskTrackerMemberFunction, Unretained(&task_tracker_),
            Bind(&CancelableTaskTracker::TryCancelAll)));
 
   test_task_runner->RunUntilIdle();
 }
 
 }  // namespace base