Single ATRACE_CALL per function

Tracing was fixed in ag/1940080, which
was later reverted. This change re-applies
portion of the patch.

Test: m -j
Change-Id: I31cc126e6c222f6d8ae02803c037da773c9b8c4d
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index cae4dea..33278ae 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -1739,7 +1739,7 @@
 
     // rebuild the visible layer list per screen
     if (CC_UNLIKELY(mVisibleRegionsDirty)) {
-        ATRACE_CALL();
+        ATRACE_NAME("rebuildLayerStacks VR Dirty");
         mVisibleRegionsDirty = false;
         invalidateHwcGeometry();