Remove a bunch of fixed position dead code.

sky/engine/core/rendering/RenderBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 403 matching lines @@
 
     if (parentBox)
         parentBox->scrollRectToVisible(newRect, alignX, alignY);
 }
 
 void RenderBox::absoluteRects(Vector<IntRect>& rects, const LayoutPoint& accumulatedOffset) const
 {
     rects.append(pixelSnappedIntRect(accumulatedOffset, size()));
 }
 
-void RenderBox::absoluteQuads(Vector<FloatQuad>& quads, bool* wasFixed) const
+void RenderBox::absoluteQuads(Vector<FloatQuad>& quads) const
 {
-    quads.append(localToAbsoluteQuad(FloatRect(0, 0, width().toFloat(), height().toFloat()), 0 /* mode */, wasFixed));
+    quads.append(localToAbsoluteQuad(FloatRect(0, 0, width().toFloat(), height().toFloat()), 0 /* mode */));
 }
 
 void RenderBox::updateLayerTransformAfterLayout()
 {
     // Transform-origin depends on box size, so we need to update the layer transform after layout.
     if (hasLayer())
         layer()->updateTransformationMatrix();
 }
 
 LayoutUnit RenderBox::constrainLogicalWidthByMinMax(LayoutUnit logicalWidth, LayoutUnit availableWidth, RenderBlock* cb) const
@@ skipping 1094 matching lines @@
             ? view()->frameView()->unscaledVisibleContentSize().height()
             : view()->frameView()->unscaledVisibleContentSize().width();
         LayoutUnit fillAvailableExtent = containingBlock()->availableLogicalHeight(ExcludeMarginBorderPadding);
         return std::min(fillAvailableExtent, fillFallbackExtent);
     }
 
     // Use the content box logical height as specified by the style.
     return cb->adjustContentBoxLogicalHeightForBoxSizing(logicalHeightLength.value());
 }
 
-void RenderBox::mapLocalToContainer(const RenderLayerModelObject* paintInvalidationContainer, TransformState& transformState, MapCoordinatesFlags mode, bool* wasFixed, const PaintInvalidationState* paintInvalidationState) const
+void RenderBox::mapLocalToContainer(const RenderLayerModelObject* paintInvalidationContainer, TransformState& transformState, MapCoordinatesFlags mode, const PaintInvalidationState* paintInvalidationState) const
 {
     if (paintInvalidationContainer == this)
         return;
 
     if (paintInvalidationState && paintInvalidationState->canMapToContainer(paintInvalidationContainer)) {
         LayoutSize offset = paintInvalidationState->paintOffset() + locationOffset();
         if (style()->hasInFlowPosition() && layer())
             offset += layer()->offsetForInFlowPosition();
         transformState.move(offset);
         return;
     }
 
     bool containerSkipped;
     RenderObject* o = container(paintInvalidationContainer, &containerSkipped);
     if (!o)
         return;
 
-    bool hasTransform = hasLayer() && layer()->transform();
-    // If this box has a transform, it acts as a fixed position container for fixed descendants,
-    // and may itself also be fixed position. So propagate 'fixed' up only if this box is fixed position.
-    if (hasTransform)
-        mode &= ~IsFixed;
-
-    if (wasFixed)
-        *wasFixed = mode & IsFixed;
-
     LayoutSize containerOffset = offsetFromContainer(o, roundedLayoutPoint(transformState.mappedPoint()));
 
     bool preserve3D = mode & UseTransforms && (o->style()->preserves3D() || style()->preserves3D());
     if (mode & UseTransforms && shouldUseTransformFromContainer(o)) {
         TransformationMatrix t;
         getTransformFromContainer(o, containerOffset, t);
         transformState.applyTransform(t, preserve3D ? TransformState::AccumulateTransform : TransformState::FlattenTransform);
     } else
         transformState.move(containerOffset.width(), containerOffset.height(), preserve3D ? TransformState::AccumulateTransform : TransformState::FlattenTransform);
 
     if (containerSkipped) {
         // There can't be a transform between paintInvalidationContainer and o, because transforms create containers, so it should be safe
         // to just subtract the delta between the paintInvalidationContainer and o.
         LayoutSize containerOffset = paintInvalidationContainer->offsetFromAncestorContainer(o);
         transformState.move(-containerOffset.width(), -containerOffset.height(), preserve3D ? TransformState::AccumulateTransform : TransformState::FlattenTransform);
         return;
     }
 
     mode &= ~ApplyContainerFlip;
 
-    o->mapLocalToContainer(paintInvalidationContainer, transformState, mode, wasFixed);
-}
-
-void RenderBox::mapAbsoluteToLocalPoint(MapCoordinatesFlags mode, TransformState& transformState) const
-{
-    bool hasTransform = hasLayer() && layer()->transform();
-    if (hasTransform) {
-        // If this box has a transform, it acts as a fixed position container for fixed descendants,
-        // and may itself also be fixed position. So propagate 'fixed' up only if this box is fixed position.
-        mode &= ~IsFixed;
-    }
-
-    RenderBoxModelObject::mapAbsoluteToLocalPoint(mode, transformState);
+    o->mapLocalToContainer(paintInvalidationContainer, transformState, mode);
 }
 
 LayoutSize RenderBox::offsetFromContainer(const RenderObject* o, const LayoutPoint& point, bool* offsetDependsOnPoint) const
 {
     ASSERT(o == container());
 
     LayoutSize offset;
     if (isRelPositioned())
         offset += offsetForInFlowPosition();
 
@@ skipping 2574 matching lines @@
 
 RenderBox::BoxDecorationData::BoxDecorationData(const RenderStyle& style)
 {
     backgroundColor = style.colorIncludingFallback(CSSPropertyBackgroundColor);
     hasBackground = backgroundColor.alpha() || style.hasBackgroundImage();
     ASSERT(hasBackground == style.hasBackground());
     hasBorder = style.hasBorder();
 }
 
 } // namespace blink