Bug 1786959 - Rename "RenderLayers" to "WrDisplayList". r=gfx-reviewers,bradwerth

This more accurately describes what happens in this time period.

Differential Revision: https://phabricator.services.mozilla.com/D155511

gfx/layers/wr/WebRenderLayerManager.cpp

@@ -330,7 +330,7 @@ void WebRenderLayerManager::EndTransactionWithoutLayer(
     nsDisplayList* aDisplayList, nsDisplayListBuilder* aDisplayListBuilder,
     WrFiltersHolder&& aFilters, WebRenderBackgroundData* aBackground,
     const double aGeckoDLBuildTime) {
-  AUTO_PROFILER_TRACING_MARKER("Paint", "RenderLayers", GRAPHICS);
+  AUTO_PROFILER_TRACING_MARKER("Paint", "WrDisplayList", GRAPHICS);
 
   // Since we don't do repeat transactions right now, just set the time
   mAnimationReadyTime = TimeStamp::Now();