Change EXPECT/ASSERT_DCHECK_DEATH macro to not expose the |regex| parameter.

base/message_loop/message_pump_libevent_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 "base/message_loop/message_pump_libevent.h"
 
 #include <unistd.h>
 
 #include <memory>
 
@@ skipping 75 matching lines @@
 #else
 #define MAYBE_TestWatchingFromBadThread TestWatchingFromBadThread
 #endif
 TEST_F(MessagePumpLibeventTest, MAYBE_TestWatchingFromBadThread) {
   MessagePumpLibevent::FileDescriptorWatcher watcher;
   StupidWatcher delegate;
 
   ASSERT_DCHECK_DEATH(
       io_loop()->WatchFileDescriptor(STDOUT_FILENO, false,
                                      MessageLoopForIO::WATCH_READ, &watcher,
-                                     &delegate),
-      "Check failed: "
-      "watch_file_descriptor_caller_checker_.CalledOnValidThread\\(\\)");
+                                     &delegate));
 }
 
 TEST_F(MessagePumpLibeventTest, QuitOutsideOfRun) {
   std::unique_ptr<MessagePumpLibevent> pump(new MessagePumpLibevent);
-  ASSERT_DCHECK_DEATH(pump->Quit(),
-                      "Check failed: in_run_. "
-                      "Quit was called outside of Run!");
+  ASSERT_DCHECK_DEATH(pump->Quit());
 }
 
 class BaseWatcher : public MessagePumpLibevent::Watcher {
  public:
   explicit BaseWatcher(MessagePumpLibevent::FileDescriptorWatcher* controller)
       : controller_(controller) {
     DCHECK(controller_);
   }
   ~BaseWatcher() override {}
 
@@ skipping 160 matching lines @@
 
   // StartWatching can move |watcher| to IO thread. Release on IO thread.
   io_loop()->task_runner()->PostTask(
       FROM_HERE,
       Bind(&WaitableEventWatcher::StopWatching, Owned(watcher.release())));
 }
 
 }  // namespace
 
 }  // namespace base