ash: Add SessionController/Client mojo interfaces

ash/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
 
 assert(use_aura)
@@ skipping 113 matching lines @@
     "common/mojo_interface_factory.h",
     "common/multi_profile_uma.cc",
     "common/multi_profile_uma.h",
     "common/new_window_client_proxy.cc",
     "common/new_window_client_proxy.h",
     "common/palette_delegate.h",
     "common/popup_message.cc",
     "common/popup_message.h",
     "common/scoped_root_window_for_new_windows.cc",
     "common/scoped_root_window_for_new_windows.h",
+    "common/session/session_controller.cc",
+    "common/session/session_controller.h",
     "common/session/session_state_delegate.cc",
     "common/session/session_state_delegate.h",
     "common/session/session_state_observer.cc",
     "common/session/session_state_observer.h",
     "common/shelf/app_list_button.cc",
     "common/shelf/app_list_button.h",
     "common/shelf/app_list_shelf_item_delegate.cc",
     "common/shelf/app_list_shelf_item_delegate.h",
     "common/shelf/ink_drop_button_listener.h",
     "common/shelf/overflow_bubble.cc",
@@ skipping 1361 matching lines @@
   if (is_win) {
     configs -= [ "//build/config/win:console" ]
     configs += [ "//build/config/win:windowed" ]
     deps += [ "//sandbox" ]
   }
 
   if (is_chromeos) {
     deps += [ "//device/bluetooth" ]
   }
 }