Remove CSSCompositing

sky/engine/core/rendering/compositing/CompositedLayerMapping.cpp

Index: sky/engine/core/rendering/compositing/CompositedLayerMapping.cpp
diff --git a/sky/engine/core/rendering/compositing/CompositedLayerMapping.cpp b/sky/engine/core/rendering/compositing/CompositedLayerMapping.cpp
index 760ae652af38b3ff0d5a37daa1827e7630727375..91e5d301268fcd94ad88fea34738c51c41269e2e 100644
--- a/sky/engine/core/rendering/compositing/CompositedLayerMapping.cpp
+++ b/sky/engine/core/rendering/compositing/CompositedLayerMapping.cpp
@@ -179,11 +179,6 @@ void CompositedLayerMapping::createPrimaryGraphicsLayer()
     updateOpacity(renderer()->style());
     updateTransform(renderer()->style());
     updateFilters(renderer()->style());
-
-    if (RuntimeEnabledFeatures::cssCompositingEnabled()) {
-        updateLayerBlendMode(renderer()->style());
-        updateIsRootForIsolatedGroup();
-    }
 }
 
 void CompositedLayerMapping::destroyGraphicsLayers()
@@ -224,21 +219,6 @@ void CompositedLayerMapping::updateFilters(const RenderStyle* style)
     m_graphicsLayer->setFilters(owningLayer().computeFilterOperations(style));
 }
 
-void CompositedLayerMapping::updateLayerBlendMode(const RenderStyle* style)
-{
-    setBlendMode(style->blendMode());
-}
-
-void CompositedLayerMapping::updateIsRootForIsolatedGroup()
-{
-    bool isolate = m_owningLayer.shouldIsolateCompositedDescendants();
-
-    // non stacking context layers should never isolate
-    ASSERT(m_owningLayer.stackingNode()->isStackingContext() || !isolate);
-
-    m_graphicsLayer->setIsRootForIsolatedGroup(isolate);
-}
-
 void CompositedLayerMapping::updateContentsOpaque()
 {
     // For non-root layers, background is always painted by the primary graphics layer.
@@ -579,11 +559,6 @@ void CompositedLayerMapping::updateGraphicsLayerGeometry(const RenderLayer* comp
     if (m_owningLayer.scrollableArea() && m_owningLayer.scrollableArea()->scrollsOverflow())
         m_owningLayer.scrollableArea()->positionOverflowControls(IntSize());
 
-    if (RuntimeEnabledFeatures::cssCompositingEnabled()) {
-        updateLayerBlendMode(renderer()->style());
-        updateIsRootForIsolatedGroup();
-    }
-
     updateContentsRect();
     updateBackgroundColor();
     updateDrawsContent();