chromeos: Refactor system tray ShowNetworkSettingsForGuid for mash

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

Index: ash/common/system/chromeos/network/network_state_list_detailed_view.cc
diff --git a/ash/common/system/chromeos/network/network_state_list_detailed_view.cc b/ash/common/system/chromeos/network/network_state_list_detailed_view.cc
index ef7294ea66d60eafbc2e490a2255d339a07ce3c7..57d600a493370f4c14dc5ea0e0f866fa7cc7aa37 100644
--- a/ash/common/system/chromeos/network/network_state_list_detailed_view.cc
+++ b/ash/common/system/chromeos/network/network_state_list_detailed_view.cc
@@ -435,7 +435,7 @@ void NetworkStateListDetailedView::HandleViewClicked(views::View* view) {
         list_type_ == LIST_TYPE_VPN
             ? UMA_STATUS_AREA_SHOW_NETWORK_CONNECTION_DETAILS
             : UMA_STATUS_AREA_SHOW_VPN_CONNECTION_DETAILS);
-    WmShell::Get()->system_tray_delegate()->ShowNetworkSettingsForGuid(
+    WmShell::Get()->system_tray_controller()->ShowNetworkSettings(
         network ? network->guid() : "");

[msw, 2016/10/05 22:56:36]

nit: s/""/std::string()/

[James Cook, 2016/10/05 23:03:52]

Done.

   } else {
     WmShell::Get()->RecordUserMetricsAction(
@@ -513,7 +513,7 @@ void NetworkStateListDetailedView::ShowSettings() {
   WmShell::Get()->RecordUserMetricsAction(
       list_type_ == LIST_TYPE_VPN ? UMA_STATUS_AREA_VPN_SETTINGS_OPENED
                                   : UMA_STATUS_AREA_NETWORK_SETTINGS_OPENED);
-  WmShell::Get()->system_tray_delegate()->ShowNetworkSettingsForGuid("");
+  WmShell::Get()->system_tray_controller()->ShowNetworkSettings("");

[msw, 2016/10/05 22:56:36]

nit: s/""/std::string()/

[James Cook, 2016/10/05 23:03:52]

Done.

 }
 
 void NetworkStateListDetailedView::CreateNetworkExtra() {