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

ash/system/tray/tray_details_view.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/tray/tray_details_view.h"
 
+#include "ash/system/tray/system_tray_item.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/system/tray/tray_views.h"
 #include "ui/gfx/canvas.h"
 #include "ui/views/background.h"
 #include "ui/views/controls/scroll_view.h"
 #include "ui/views/layout/box_layout.h"
 
 namespace ash {
 namespace internal {
 
@@ skipping 15 matching lines @@
 
   virtual gfx::Insets GetInsets() const OVERRIDE {
     return gfx::Insets(0, 0, 1, 0);
   }
 
   bool visible_;
 
   DISALLOW_COPY_AND_ASSIGN(ScrollBorder);
 };
 
-TrayDetailsView::TrayDetailsView()
-    : footer_(NULL),
+TrayDetailsView::TrayDetailsView(SystemTrayItem* owner)
+    : owner_(owner),
+      footer_(NULL),
       scroller_(NULL),
       scroll_content_(NULL),
       scroll_border_(NULL) {
   SetLayoutManager(new views::BoxLayout(views::BoxLayout::kVertical,
       0, 0, 0));
   set_background(views::Background::CreateSolidBackground(kBackgroundColor));
 }
 
 TrayDetailsView::~TrayDetailsView() {
 }
@@ skipping 58 matching lines @@
       scroll_border_->set_visible(true);
     else
       scroll_border_->set_visible(false);
   }
 
   views::View::OnPaintBorder(canvas);
 }
 
 }  // namespace internal
 }  // namespace ash