Move tray code from ui/chromeos/network/

ash/common/system/chromeos/network/tray_network_state_observer.cc

 // Copyright (c) 2012 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 "ash/common/system/chromeos/network/tray_network_state_observer.h"
 
 #include <set>
 #include <string>
 
+#include "ash/common/system/chromeos/network/network_icon.h"
 #include "ash/common/system/tray/system_tray.h"
 #include "base/location.h"
 #include "chromeos/network/network_state.h"
 #include "chromeos/network/network_state_handler.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
-#include "ui/chromeos/network/network_icon.h"
 #include "ui/compositor/scoped_animation_duration_scale_mode.h"
 
 using chromeos::NetworkHandler;
 
 namespace {
 
 const int kUpdateFrequencyMs = 1000;
 
 }  // namespace
 
@@ skipping 55 matching lines @@
 void TrayNetworkStateObserver::SignalUpdate() {
   if (timer_.IsRunning())
     return;
   timer_.Start(FROM_HERE, base::TimeDelta::FromMilliseconds(update_frequency_),
                this, &TrayNetworkStateObserver::SendNetworkStateChanged);
 }
 
 void TrayNetworkStateObserver::SendNetworkStateChanged() {
   delegate_->NetworkStateChanged();
   if (purge_icons_) {
-    ui::network_icon::PurgeNetworkIconCache();
+    network_icon::PurgeNetworkIconCache();
     purge_icons_ = false;
   }
 }
 
 }  // namespace ash