More DCHECK() updates. A mixture of _EQ and _GE.

base/message_pump_libevent.cc

 // Copyright (c) 2010 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_pump_libevent.h"
 
 #include <errno.h>
 #include <fcntl.h>
 
 #include "base/auto_reset.h"
@@ skipping 60 matching lines @@
   int rv = event_del(e);
   delete e;
   pump_ = NULL;
   watcher_ = NULL;
   return (rv == 0);
 }
 
 void MessagePumpLibevent::FileDescriptorWatcher::Init(event *e,
                                                       bool is_persistent) {
   DCHECK(e);
-  DCHECK(event_ == NULL);
+  DCHECK(!event_);
 
   is_persistent_ = is_persistent;
   event_ = e;
 }
 
 event *MessagePumpLibevent::FileDescriptorWatcher::ReleaseEvent() {
   struct event *e = event_;
   event_ = NULL;
   return e;
 }
@@ skipping 254 matching lines @@
 
   // Remove and discard the wakeup byte.
   char buf;
   int nread = HANDLE_EINTR(read(socket, &buf, 1));
   DCHECK_EQ(nread, 1);
   // Tell libevent to break out of inner loop.
   event_base_loopbreak(that->event_base_);
 }
 
 }  // namespace base