Stop using shell::GetInstance()->system_tray() in system tray items

ash/system/chromeos/network/tray_network.cc

Index: ash/system/chromeos/network/tray_network.cc
diff --git a/ash/system/chromeos/network/tray_network.cc b/ash/system/chromeos/network/tray_network.cc
index 38818fa30df5633e52224db9d8f96b33f5f4383f..64f0dd0577f6ce357721c9826623931ff80d8a27 100644
--- a/ash/system/chromeos/network/tray_network.cc
+++ b/ash/system/chromeos/network/tray_network.cc
@@ -79,8 +79,8 @@ class NetworkMessages {
 
 class NetworkTrayView : public TrayItemView {
  public:
-  NetworkTrayView(ColorTheme size, bool tray_icon)
-      : color_theme_(size), tray_icon_(tray_icon) {
+  NetworkTrayView(SystemTrayItem* tray, ColorTheme size, bool tray_icon)
+      : TrayItemView(tray), color_theme_(size), tray_icon_(tray_icon) {
     SetLayoutManager(
         new views::BoxLayout(views::BoxLayout::kHorizontal, 0, 0, 0));
 
@@ -114,8 +114,8 @@ class NetworkTrayView : public TrayItemView {
 
 class NetworkDefaultView : public TrayItemMore {
  public:
-  NetworkDefaultView(SystemTrayItem* owner, bool show_more)
-      : TrayItemMore(owner, show_more) {
+  NetworkDefaultView(SystemTrayItem* tray, bool show_more)
+      : TrayItemMore(tray, show_more) {
     Update();
   }
 
@@ -136,8 +136,10 @@ class NetworkDefaultView : public TrayItemMore {
 
 class NetworkListDetailedView : public NetworkListDetailedViewBase {
  public:
-  NetworkListDetailedView(user::LoginStatus login, int header_string_id)
-      : NetworkListDetailedViewBase(login, header_string_id),
+  NetworkListDetailedView(SystemTrayItem* tray,
+                          user::LoginStatus login,
+                          int header_string_id)
+      : NetworkListDetailedViewBase(tray, login, header_string_id),
         airplane_(NULL),
         button_wifi_(NULL),
         button_mobile_(NULL),
@@ -361,7 +363,8 @@ class NetworkListDetailedView : public NetworkListDetailedViewBase {
 
 class NetworkWifiDetailedView : public NetworkDetailedView {
  public:
-  explicit NetworkWifiDetailedView(bool wifi_enabled) {
+  NetworkWifiDetailedView(SystemTrayItem* tray, bool wifi_enabled)
+     : NetworkDetailedView(tray) {
     SetLayoutManager(new views::BoxLayout(views::BoxLayout::kHorizontal,
                                           kTrayPopupPaddingHorizontal,
                                           10,
@@ -505,8 +508,9 @@ class NetworkNotificationView : public TrayNotificationView {
 
 }  // namespace tray
 
-TrayNetwork::TrayNetwork()
-    : tray_(NULL),
+TrayNetwork::TrayNetwork(SystemTray* system_tray)
+    : SystemTrayItem(system_tray),
+      tray_(NULL),
       default_(NULL),
       detailed_(NULL),
       notification_(NULL),
@@ -519,7 +523,7 @@ TrayNetwork::~TrayNetwork() {
 
 views::View* TrayNetwork::CreateTrayView(user::LoginStatus status) {
   CHECK(tray_ == NULL);
-  tray_ = new tray::NetworkTrayView(tray::LIGHT, true /*tray_icon*/);
+  tray_ = new tray::NetworkTrayView(this, tray::LIGHT, true /*tray_icon*/);
   return tray_;
 }
 
@@ -538,11 +542,12 @@ views::View* TrayNetwork::CreateDetailedView(user::LoginStatus status) {
   if (request_wifi_view_) {
     SystemTrayDelegate* delegate = Shell::GetInstance()->tray_delegate();
     // The Wi-Fi state is not toggled yet at this point.
-    detailed_ = new tray::NetworkWifiDetailedView(!delegate->GetWifiEnabled());
+    detailed_ = new tray::NetworkWifiDetailedView(this,
+                                                  !delegate->GetWifiEnabled());
     request_wifi_view_ = false;
   } else {
     detailed_ = new tray::NetworkListDetailedView(
-        status, IDS_ASH_STATUS_TRAY_NETWORK);
+        this, status, IDS_ASH_STATUS_TRAY_NETWORK);
     detailed_->Init();
   }
   return detailed_;