Ensure that just started broker doesn't get events addressed to dead instance.

ceee/ie/broker/broker_rpc_server.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 Server implementation.
 
 #include "ceee/ie/broker/broker_rpc_server.h"
 
 #include "base/atomic_sequence_num.h"
 #include "base/metrics/histogram.h"
@@ skipping 109 matching lines @@
 }
 
 // Called when client process terminated without releasing context handle.
 void __RPC_USER BrokerContextHandle_rundown(BrokerContextHandle context) {
   DCHECK(context != NULL);
   ceee_module_util::UnlockModule();
 }
 
 void BrokerRpcServer_FireEvent(
     handle_t binding_handle,
+    BrokerContextHandle context,
     const char* event_name,
     const char* event_args) {
   DCHECK(ChromePostman::GetInstance());
   if (ChromePostman::GetInstance())
     ChromePostman::GetInstance()->FireEvent(event_name, event_args);
 }
 
 void BrokerRpcServer_SendUmaHistogramTimes(handle_t binding_handle,
                                            const char* name,
                                            int sample) {
@@ skipping 18 matching lines @@
   // We can't unfortunately use the HISTOGRAM_*_COUNT here because they use
   // static variables to save time.
   AutoLock lock(g_metrics_lock);
   scoped_refptr<base::Histogram> counter =
       base::Histogram::FactoryGet(name, min, max, bucket_count,
           base::Histogram::kUmaTargetedHistogramFlag);
   DCHECK_EQ(name, counter->histogram_name());
   if (counter.get())
     counter->AddTime(base::TimeDelta::FromMilliseconds(sample));
 }