Remove assumption that null containerForRepaint assumes RenderView

Source/web/LinkHighlight.cpp

Index: Source/web/LinkHighlight.cpp
diff --git a/Source/web/LinkHighlight.cpp b/Source/web/LinkHighlight.cpp
index cb4f6f137d9959b120b2ed734e348122e49157d5..9d91774e8840717367ffb3ca1694e3db1afd3522 100644
--- a/Source/web/LinkHighlight.cpp
+++ b/Source/web/LinkHighlight.cpp
@@ -113,20 +113,15 @@ RenderLayer* LinkHighlight::computeEnclosingCompositingLayer()
     // Find the nearest enclosing composited layer and attach to it. We may need to cross frame boundaries
     // to find a suitable layer.
     RenderObject* renderer = m_node->renderer();
-    RenderLayerModelObject* repaintContainer;
+    RenderLayer* renderLayer;
     do {
-        repaintContainer = renderer->containerForRepaint();
-        // FIXME: Repaint container should never be null. crbug.com/363699
-        if (!repaintContainer) {
+        renderLayer = renderer->enclosingLayer()->enclosingCompositingLayerForRepaint();
+        if (!renderLayer) {
             renderer = renderer->frame()->ownerRenderer();
             if (!renderer)
                 return 0;
         }
-    } while (!repaintContainer);
-    RenderLayer* renderLayer = repaintContainer->layer();
-
-    if (!renderLayer || renderLayer->compositingState() == NotComposited)
-        return 0;
+    } while (!renderLayer);
 
     CompositedLayerMappingPtr compositedLayerMapping = renderLayer->compositingState() == PaintsIntoGroupedBacking ? renderLayer->groupedMapping() : renderLayer->compositedLayerMapping();
     GraphicsLayer* newGraphicsLayer = renderLayer->compositingState() == PaintsIntoGroupedBacking ? compositedLayerMapping->squashingLayer() : compositedLayerMapping->mainGraphicsLayer();