Clean up some dead code in core renderer

sky/engine/core/rendering/RenderBox.cpp

@@ -995,7 +995,6 @@ void RenderBox::paintFillLayers(const PaintInfo& paintInfo, const Color& c, cons
     Vector<const FillLayer*, 8> layers;
     const FillLayer* curLayer = &fillLayer;
     bool shouldDrawBackgroundInSeparateBuffer = false;
-    bool isBottomLayerOccluded = false;
     while (curLayer) {
         layers.append(curLayer);
         // Stop traversal when an opaque layer is encountered.
@@ -1015,9 +1014,6 @@ void RenderBox::paintFillLayers(const PaintInfo& paintInfo, const Color& c, cons
         curLayer = curLayer->next();
     }
 
-    if (layers.size() > 0  && (**layers.rbegin()).next())
-        isBottomLayerOccluded = true;
-
     GraphicsContext* context = paintInfo.context;
     if (!context)
         shouldDrawBackgroundInSeparateBuffer = false;

sky/engine/core/rendering/RenderLineBoxList.cpp

@@ -144,11 +144,6 @@ void RenderLineBoxList::dirtyLineBoxes()
 
 bool RenderLineBoxList::rangeIntersectsRect(RenderBoxModelObject* renderer, LayoutUnit logicalTop, LayoutUnit logicalBottom, const LayoutRect& rect, const LayoutPoint& offset) const
 {
-    RenderBox* block;
-    if (renderer->isBox())
-        block = toRenderBox(renderer);
-    else
-        block = renderer->containingBlock();
     LayoutUnit physicalStart = logicalTop;
     LayoutUnit physicalEnd = logicalBottom;
     LayoutUnit physicalExtent = absoluteValue(physicalEnd - physicalStart);

sky/engine/core/rendering/RenderParagraph.cpp

@@ -704,7 +704,6 @@ BidiRun* RenderParagraph::computeInlineDirectionPositionsForSegment(RootInlineBo
     unsigned expansionOpportunityCount = 0;
     bool isAfterExpansion = true;
     Vector<unsigned, 16> expansionOpportunities;
-    RenderObject* previousObject = 0;
     TextJustify textJustify = style()->textJustify();
 
     BidiRun* r = firstRun;
@@ -744,7 +743,6 @@ BidiRun* RenderParagraph::computeInlineDirectionPositionsForSegment(RootInlineBo
         }
 
         totalLogicalWidth += r->m_box->logicalWidth();
-        previousObject = r->m_object;
     }
 
     if (isAfterExpansion && !expansionOpportunities.isEmpty()) {