Remove LifecycleNotifier<>::m_context.

Source/core/page/Page.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All Rights Reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 95 matching lines @@
 {
     if (!frame)
         return 1;
     Page* page = frame->page();
     if (!page)
         return 1;
     return page->deviceScaleFactor();
 }
 
 Page::Page(PageClients& pageClients)
-    : PageLifecycleNotifier(this)
-    , SettingsDelegate(Settings::create())
+    : SettingsDelegate(Settings::create())
     , m_animator(PageAnimator::create(*this))
     , m_autoscrollController(AutoscrollController::create(*this))
     , m_chrome(Chrome::create(this, pageClients.chromeClient))
     , m_dragCaretController(DragCaretController::create())
     , m_dragController(DragController::create(this, pageClients.dragClient))
     , m_focusController(FocusController::create(this))
     , m_contextMenuController(ContextMenuController::create(this, pageClients.contextMenuClient))
     , m_pointerLockController(PointerLockController::create(this))
     , m_undoStack(UndoStack::create())
     , m_instrumentingAgents(InstrumentingAgents::create())
@@ skipping 498 matching lines @@
     , dragClient(nullptr)
     , spellCheckerClient(nullptr)
 {
 }
 
 Page::PageClients::~PageClients()
 {
 }
 
 } // namespace blink