[WIP] Move layout states into the DocumentLifecycle state machine

Source/core/frame/FrameView.h

Index: Source/core/frame/FrameView.h
diff --git a/Source/core/frame/FrameView.h b/Source/core/frame/FrameView.h
index 61504f6b9cf7538169ce6d00e8c8f82a53f7039c..2d2969f2024b0b3391b246c3a4072d73ae8d0b9a 100644
--- a/Source/core/frame/FrameView.h
+++ b/Source/core/frame/FrameView.h
@@ -87,9 +87,8 @@ public:
     bool didFirstLayout() const;
     void scheduleRelayout();
     void scheduleRelayoutOfSubtree(RenderObject*);
-    void unscheduleRelayout();
     bool layoutPending() const;
-    bool isInPerformLayout() const { return m_inPerformLayout; }
+    bool isInPerformLayout() const;
 
     void setCanRepaintDuringPerformLayout(bool b) { m_canRepaintDuringPerformLayout = b; }
     bool canRepaintDuringPerformLayout() const { return m_canRepaintDuringPerformLayout; }
@@ -355,6 +354,8 @@ private:
 
     void gatherDebugLayoutRects(RenderObject* layoutRoot);
 
+    DocumentLifecycle& lifecycle() const;
+
     virtual void repaintContentRectangle(const IntRect&) OVERRIDE;
     virtual void contentsResized() OVERRIDE;
     virtual void scrollbarExistenceDidChange() OVERRIDE;
@@ -412,7 +413,7 @@ private:
         if (!RuntimeEnabledFeatures::repaintAfterLayoutEnabled())
             return true;
 
-        return !m_inPerformLayout || canRepaintDuringPerformLayout();
+        return !isInPerformLayout() || canRepaintDuringPerformLayout();
     }
 
     static double s_currentFrameTimeStamp; // used for detecting decoded resource thrash in the cache
@@ -437,7 +438,6 @@ private:
     unsigned m_slowRepaintObjectCount;
 
     bool m_hasPendingLayout;
-    bool m_delayedLayout;
     RenderObject* m_layoutSubtreeRoot;
 
     bool m_layoutSchedulingEnabled;