Add NetworkHandler to own network handlers in src/chromeos/network

ash/system/chromeos/network/network_state_notifier_unittest.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/system/chromeos/network/network_state_notifier.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "ash/system/status_area_widget.h"
@@ skipping 78 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(NetworkStateNotifierTest);
 };
 
 TEST_F(NetworkStateNotifierTest, ConnectionFailure) {
   EXPECT_FALSE(GetSystemTray()->HasNotificationBubble());
   // State -> Failure for non connecting network should not spawn a notification
   SetServiceState("wifi1", flimflam::kStateFailure);
   EXPECT_FALSE(GetSystemTray()->CloseNotificationBubbleForTest());
   // State -> Failure for connecting network should spawn a notification
   SetServiceState("wifi1", flimflam::kStateAssociation);
-  NetworkStateHandler::Get()->SetConnectingNetwork("wifi1");
+  NetworkHandler::Get()->network_state_handler()->SetConnectingNetwork("wifi1");
   SetServiceState("wifi1", flimflam::kStateFailure);
   EXPECT_TRUE(GetSystemTray()->CloseNotificationBubbleForTest());
   // Failure -> Idle should not spawn a notification
   SetServiceState("wifi1", flimflam::kStateIdle);
   EXPECT_FALSE(GetSystemTray()->HasNotificationBubble());
   // Idle  -> Failure should also not spawn a notification
   SetServiceState("wifi1", flimflam::kStateFailure);
   EXPECT_FALSE(GetSystemTray()->HasNotificationBubble());
 }
 
 }  // namespace test
 }  // namespace ash