Remove cached bounds in RenderLayer.

Source/core/rendering/RenderLayer.h

Index: Source/core/rendering/RenderLayer.h
diff --git a/Source/core/rendering/RenderLayer.h b/Source/core/rendering/RenderLayer.h
index 03d5fe0e62f3423b2c7cf015733cfdd5d8c73889..a25b9c0d045a016663ecbceb2914c3688f7d1dff 100644
--- a/Source/core/rendering/RenderLayer.h
+++ b/Source/core/rendering/RenderLayer.h
@@ -135,11 +135,8 @@ public:
         return curr;
     }
 
-    const LayoutPoint& location() const { ASSERT(!m_needsPositionUpdate); return m_location; }
-    // FIXME: size() should ASSERT(!m_needsPositionUpdate) as well, but that fails in some tests,
-    // for example, fast/repaint/clipped-relative.html.
-    const IntSize& size() const { return m_size; }
-    void setSizeHackForRenderTreeAsText(const IntSize& size) { m_size = size; }
+    const LayoutPoint location() const;
+    const IntSize size() const;
 
     LayoutRect rect() const { return LayoutRect(location(), size()); }
 
@@ -152,7 +149,6 @@ public:
     void contentChanged(ContentChangeType);
 
     void updateLayerPositionsAfterLayout();
-    void updateLayerPositionsAfterOverflowScroll();
 
     bool isPaginated() const { return m_isPaginated; }
     RenderLayer* enclosingPaginationLayer() const { return m_enclosingPaginationLayer; }
@@ -160,7 +156,8 @@ public:
     void updateTransformationMatrix();
     RenderLayer* renderingContextRoot();
 
-    const LayoutSize& offsetForInFlowPosition() const { return m_offsetForInFlowPosition; }
+    // Our current relative position offset.
+    const LayoutSize offsetForInFlowPosition() const;
 
     void blockSelectionGapsBoundsChanged();
     void addBlockSelectionGapsBounds(const LayoutRect&);
@@ -552,11 +549,7 @@ private:
     void clipToRect(const LayerPaintingInfo&, GraphicsContext*, const ClipRect&, PaintLayerFlags, BorderRadiusClippingRule = IncludeSelfForBorderRadius);
     void restoreClip(GraphicsContext*, const LayoutRect& paintDirtyRect, const ClipRect&);
 
-    // Returns true if the position changed.
-    bool updateLayerPosition();
-
     void updateLayerPositionRecursive();
-    void updateLayerPositionsAfterScrollRecursive();
 
     void setNextSibling(RenderLayer* next) { m_next = next; }
     void setPreviousSibling(RenderLayer* prev) { m_previous = prev; }
@@ -683,10 +676,6 @@ private:
 
     unsigned m_isPaginated : 1; // If we think this layer is split by a multi-column ancestor, then this bit will be set.
 
-#if ENABLE(ASSERT)
-    unsigned m_needsPositionUpdate : 1;
-#endif
-
     unsigned m_3DTransformedDescendantStatusDirty : 1;
     // Set on a stacking context layer that has 3D descendants anywhere
     // in a preserves3D hierarchy. Hint to do 3D-aware hit testing.
@@ -724,15 +713,6 @@ private:
     RenderLayer* m_first;
     RenderLayer* m_last;
 
-    // Our current relative position offset.
-    LayoutSize m_offsetForInFlowPosition;
-
-    // Our (x,y) coordinates are in our parent layer's coordinate space.
-    LayoutPoint m_location;
-
-    // The layer's width/height
-    IntSize m_size;
-
     // Cached normal flow values for absolute positioned elements with static left/top values.
     LayoutUnit m_staticInlinePosition;
     LayoutUnit m_staticBlockPosition;