Remove BackForwardClient, cleanup starting a history navigation

Source/core/loader/FrameLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) Research In Motion Limited 2009. All rights reserved.
  * Copyright (C) 2011 Kris Jordan <krisjordan@gmail.com>
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ skipping 53 matching lines @@
 #include "core/loader/DocumentLoadTiming.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FormState.h"
 #include "core/loader/FormSubmission.h"
 #include "core/loader/FrameFetchContext.h"
 #include "core/loader/FrameLoadRequest.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/loader/ProgressTracker.h"
 #include "core/loader/UniqueIdentifier.h"
 #include "core/loader/appcache/ApplicationCacheHost.h"
-#include "core/page/BackForwardClient.h"
 #include "core/page/Chrome.h"
 #include "core/page/ChromeClient.h"
 #include "core/page/CreateWindow.h"
 #include "core/page/EventHandler.h"
 #include "core/page/FrameTree.h"
 #include "core/page/Page.h"
 #include "core/page/WindowFeatures.h"
 #include "core/page/scrolling/ScrollingCoordinator.h"
 #include "core/xml/parser/XMLDocumentParser.h"
 #include "platform/Logging.h"
@@ skipping 561 matching lines @@
     // See https://bugs.webkit.org/show_bug.cgi?id=32383 for the original motivation for this.
     if (!m_frame->tree().parent() || UserGestureIndicator::processingUserGesture())
         return false;
     return request.formState() && request.formState()->formSubmissionTrigger() == SubmittedByJavaScript;
 }
 
 FrameLoadType FrameLoader::determineFrameLoadType(const FrameLoadRequest& request)
 {
     if (m_frame->tree().parent() && !m_stateMachine.committedFirstRealDocumentLoad())
         return FrameLoadTypeInitialInChildFrame;
-    if (!m_frame->tree().parent() && !m_frame->page()->backForward().backForwardListCount())
+    if (!m_frame->tree().parent() && !client()->backForwardLength())
         return FrameLoadTypeStandard;
     if (m_provisionalDocumentLoader && request.substituteData().failingURL() == m_provisionalDocumentLoader->url() && m_loadType == FrameLoadTypeBackForward)
         return FrameLoadTypeBackForward;
     if (request.resourceRequest().cachePolicy() == ReloadIgnoringCacheData)
         return FrameLoadTypeReload;
     if (request.resourceRequest().cachePolicy() == ReloadBypassingCache)
         return FrameLoadTypeReloadFromOrigin;
     if (request.lockBackForwardList() || isScriptTriggeredFormSubmissionInChildFrame(request))
         return FrameLoadTypeRedirectWithLockedBackForwardList;
     if (!request.originDocument() && request.resourceRequest().url() == m_documentLoader->urlForHistory())
@@ skipping 775 matching lines @@
     // FIXME: We need a way to propagate sandbox flags to out-of-process frames.
     Frame* parentFrame = m_frame->tree().parent();
     if (parentFrame && parentFrame->isLocalFrame())
         flags |= toLocalFrame(parentFrame)->document()->sandboxFlags();
     if (FrameOwner* frameOwner = m_frame->owner())
         flags |= frameOwner->sandboxFlags();
     return flags;
 }
 
 } // namespace blink