Fix RunLoopDeathTest to expect CHECK rather than DCHECK failure.

Bug: 832728, 703346
Change-Id: I4f400986db39b957095a30dc7770f6e6e541a8ae
Reviewed-on: https://chromium-review.googlesource.com/1012568
Commit-Queue: Wez <wez@chromium.org>
Reviewed-by: Gabriel Charette <gab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550908}

base/run_loop_unittest.cc

@@ -660,8 +660,8 @@ INSTANTIATE_TEST_CASE_P(
 
 TEST(RunLoopDeathTest, MustRegisterBeforeInstantiating) {
   TestBoundDelegate unbound_test_delegate_;
-  // Exercise the DCHECK in RunLoop::RunLoop().
-  EXPECT_DCHECK_DEATH({ RunLoop(); });
+  // RunLoop::RunLoop() should CHECK fetching the ThreadTaskRunnerHandle.
+  EXPECT_DEATH_IF_SUPPORTED({ RunLoop(); }, "");
 }
 
 TEST(RunLoopDelegateTest, NestableTasksDontRunInDefaultNestedLoops) {