Add missing base::lock usage.

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/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/process_util.h"
 #include "broker_rpc_lib.h"  // NOLINT
 #include "ceee/common/com_utils.h"
 #include "ceee/ie/broker/broker_module_util.h"
 #include "ceee/ie/broker/broker_rpc_utils.h"
 #include "ceee/ie/broker/chrome_postman.h"
 
 
 namespace {
 // This lock ensures that histograms created by the broker are thread safe.
 // The histograms created here can be initialized on multiple threads.
-Lock g_metrics_lock;
+base::Lock g_metrics_lock;
 
 RPC_STATUS PrepareEndpoint(std::wstring endpoint) {
   std::wstring protocol = kRpcProtocol;
   DCHECK(!protocol.empty());
   DCHECK(!endpoint.empty());
   if (protocol.empty() || endpoint.empty())
     return false;
   VLOG(1) << "RPC server is starting. Endpoint: " << endpoint;
   // Tell RPC runtime to use local interprocess communication for given
   // end point.
@@ skipping 142 matching lines @@
   // We can't unfortunately use the HISTOGRAM_*_COUNT here because they use
   // static variables to save time.
   base::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));
 }