DCHECK to detect invalid BrokerRpcClient usage.

ceee/ie/broker/broker_rpc_client.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.
 //
 // Broker RPC Client implementation.
 
 #include "ceee/ie/broker/broker_rpc_client.h"
 
 #include <atlbase.h>
 #include "base/lock.h"
@@ skipping 148 matching lines @@
   }
 }
 
 template<class Function, class Params>
 HRESULT BrokerRpcClient::RunRpc(bool allow_restart,
                                 Function rpc_function,
                                 const Params& params) {
   if (!rpc_function) {
     RpcDcheck("rpc_function is NULL");
   }
-  if (!is_connected())
+  if (!is_connected()) {
+    RpcDcheck("BrokerRpcClient is not connected");
     return RPC_E_FAULT;
+  }
   RpcTryExcept {
     DispatchToFunction(rpc_function, params);
     return S_OK;
   } RpcExcept(HandleRpcException(RpcExceptionCode())) {
     LogRpcException("RPC error in RunRpc", RpcExceptionCode());
 
     if (allow_restart &&
         RPC_S_OK != ::RpcMgmtIsServerListening(binding_handle_)) {
       Disconnect();
       if (SUCCEEDED(Connect(true))) {
@@ skipping 21 matching lines @@
 HRESULT BrokerRpcClient::SendUmaHistogramData(const char* name,
                                               int sample,
                                               int min,
                                               int max,
                                               int bucket_count) {
   return RunRpc(allow_restarts_,
                 &BrokerRpcClient_SendUmaHistogramData,
                 MakeRefTuple(binding_handle_, name, sample, min, max,
                           bucket_count));
 }