DevTools: reset inspector agents before frame view is reset, but after the rest of the frame intera…

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 134 matching lines @@
     ASSERT(!allPages().contains(this));
     allPages().add(this);
 
 #ifndef NDEBUG
     pageCounter.increment();
 #endif
 }
 
 Page::~Page()
 {
+    // Disable all agents prior to resetting the frame view.
+    m_inspectorController->inspectedPageDestroyed();
+
     m_mainFrame->setView(nullptr);
     allPages().remove(this);
     if (ordinaryPages().contains(this))
         ordinaryPages().remove(this);
 
     for (LocalFrame* frame = mainFrame(); frame; frame = frame->tree().traverseNext()) {
         frame->willDetachFrameHost();
         frame->detachFromFrameHost();
     }
 
@@ skipping 376 matching lines @@
     , spellCheckerClient(0)
     , storageClient(0)
 {
 }
 
 Page::PageClients::~PageClients()
 {
 }
 
 } // namespace WebCore