Make remaining parts of components/metrics use metrics namespace.

components/metrics/net/network_metrics_provider.cc

 // Copyright 2014 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 "components/metrics/net/network_metrics_provider.h"
 
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/task_runner_util.h"
 
 #if defined(OS_CHROMEOS)
 #include "components/metrics/net/wifi_access_point_info_provider_chromeos.h"
-#endif // OS_CHROMEOS
+#endif  // OS_CHROMEOS
 
-using metrics::SystemProfileProto;
+namespace metrics {
 
 NetworkMetricsProvider::NetworkMetricsProvider(
     base::TaskRunner* io_task_runner)
     : io_task_runner_(io_task_runner),
       connection_type_is_ambiguous_(false),
       wifi_phy_layer_protocol_is_ambiguous_(false),
       wifi_phy_layer_protocol_(net::WIFI_PHY_LAYER_PROTOCOL_UNKNOWN),
       weak_ptr_factory_(this) {
   net::NetworkChangeNotifier::AddConnectionTypeObserver(this);
   connection_type_ = net::NetworkChangeNotifier::GetConnectionType();
@@ skipping 24 matching lines @@
   connection_type_ = net::NetworkChangeNotifier::GetConnectionType();
   wifi_phy_layer_protocol_is_ambiguous_ = false;
 
   if (!wifi_access_point_info_provider_.get()) {
 #if defined(OS_CHROMEOS)
     wifi_access_point_info_provider_.reset(
         new WifiAccessPointInfoProviderChromeos());
 #else
     wifi_access_point_info_provider_.reset(
         new WifiAccessPointInfoProvider());
-#endif // OS_CHROMEOS
+#endif  // OS_CHROMEOS
   }
 
   // Connected wifi access point information.
   WifiAccessPointInfoProvider::WifiAccessPointInfo info;
   if (wifi_access_point_info_provider_->GetInfo(&info))
     WriteWifiAccessPointProto(info, network);
 }
 
 void NetworkMetricsProvider::OnConnectionTypeChanged(
     net::NetworkChangeNotifier::ConnectionType type) {
@@ skipping 143 matching lines @@
   for (std::vector<std::string>::const_iterator it = oui_list.begin();
        it != oui_list.end();
        ++it) {
     uint32 oui;
     if (base::HexStringToUInt(*it, &oui))
       vendor->add_element_identifier(oui);
     else
       NOTREACHED();
   }
 }
+
+}  // namespace metrics