Try to track down a dangling ClientSocketHandle* by upgrading DCHECKs to CHECKs.

net/base/client_socket_handle.cc

 // Copyright (c) 2006-2008 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 "net/base/client_socket_handle.h"
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "net/base/client_socket.h"
 #include "net/base/client_socket_pool.h"
@@ skipping 39 matching lines @@
     // If we did not get initialized yet, so we've got a socket request pending.
     // Cancel it.
     pool_->CancelRequest(group_name_, this);
   }
   group_name_.clear();
   is_reused_ = false;
   user_callback_ = NULL;
 }
 
 LoadState ClientSocketHandle::GetLoadState() const {
-  DCHECK(!is_initialized());
-  DCHECK(!group_name_.empty());
+  CHECK(!is_initialized());
+  CHECK(!group_name_.empty());
   return pool_->GetLoadState(group_name_, this);
 }
 
 void ClientSocketHandle::OnIOComplete(int result) {
-  DCHECK_NE(ERR_IO_PENDING, result);
+  CHECK(ERR_IO_PENDING != result);
   CompletionCallback* callback = user_callback_;
   user_callback_ = NULL;
   if (result != OK)
     ResetInternal(false);  // The request failed, so there's nothing to cancel.
   callback->Run(result);
 }
 
 }  // namespace net