Bug 1105832 - Also dump inactive layer managers when display list dumping is enabled. r=mattwoodrow

--HG--
extra : source : 882bae94b575a31209a6c4b2864a9daf5b027f76

layout/base/FrameLayerBuilder.cpp

@@ -4484,6 +4484,15 @@ FrameLayerBuilder::AddPaintedDisplayItem(PaintedLayerData* aLayerData,
       layerBuilder->WillEndTransaction();
       tempManager->AbortTransaction();
 
+#ifdef MOZ_DUMP_PAINTING
+      if (gfxUtils::DumpDisplayList() || gfxUtils::sDumpPainting) {
+        fprintf_stderr(gfxUtils::sDumpPaintFile, "Basic layer tree for painting contents of display item %s(%p):\n", aItem->Name(), aItem->Frame());
+        std::stringstream stream;
+        tempManager->Dump(stream, "", gfxUtils::sDumpPaintingToFile);
+        fprint_stderr(gfxUtils::sDumpPaintFile, stream);  // not a typo, fprint_stderr declared in LayersLogging.h
+      }
+#endif
+
       nsIntPoint offset = GetLastPaintOffset(layer) - GetTranslationForPaintedLayer(layer);
       props->MoveBy(-offset);
       nsIntRegion invalid = props->ComputeDifferences(tmpLayer, nullptr);