ash: Use SessionController instead of SessionStateDelegate

ash/common/system/chromeos/media_security/multi_profile_media_tray_item.cc

 // Copyright 2014 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/media_security/multi_profile_media_tray_item.h"
 
 #include "ash/common/ash_view_ids.h"
 #include "ash/common/media_controller.h"
-#include "ash/common/session/session_state_delegate.h"
+#include "ash/common/session/session_controller.h"
 #include "ash/common/system/tray/system_tray_notifier.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/common/system/tray/tray_item_view.h"
 #include "ash/common/wm_shell.h"
 #include "ash/resources/grit/ash_resources.h"
 #include "ash/resources/vector_icons/vector_icons.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/paint_vector_icon.h"
 #include "ui/views/controls/image_view.h"
 
@@ skipping 17 matching lines @@
     set_id(VIEW_ID_MEDIA_TRAY_VIEW);
   }
 
   ~MultiProfileMediaTrayView() override {
     WmShell::Get()->media_controller()->RemoveObserver(this);
   }
 
   // MediaCaptureObserver:
   void OnMediaCaptureChanged(
       const std::vector<mojom::MediaCaptureState>& capture_states) override {
-    SessionStateDelegate* session_state_delegate =
-        WmShell::Get()->GetSessionStateDelegate();
+    SessionController* controller = WmShell::Get()->session_controller();
     // The user at 0 is the current desktop user.
-    for (UserIndex index = 1;
-         index < session_state_delegate->NumberOfLoggedInUsers(); ++index) {
+    for (UserIndex index = 1; index < controller->NumberOfLoggedInUsers();
+         ++index) {
       if (capture_states[index] != mojom::MediaCaptureState::NONE) {
         SetVisible(true);
         return;
       }
     }
     SetVisible(false);
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MultiProfileMediaTrayView);
 };
 
 }  // namespace tray
 
 MultiProfileMediaTrayItem::MultiProfileMediaTrayItem(SystemTray* system_tray)
     : SystemTrayItem(system_tray, UMA_MULTI_PROFILE_MEDIA) {}
 
 MultiProfileMediaTrayItem::~MultiProfileMediaTrayItem() {}
 
 views::View* MultiProfileMediaTrayItem::CreateTrayView(LoginStatus status) {
   return new tray::MultiProfileMediaTrayView(this);
 }
 
 }  // namespace ash