Promoting elements transitions to their own field.

src/profile-generator.cc

Index: src/profile-generator.cc
diff --git a/src/profile-generator.cc b/src/profile-generator.cc
index 69ef082dce09da266bc4300b4781a387f25e854a..3bd2f20ea41edbb1394918d85c714b6f2f01a6d6 100644
--- a/src/profile-generator.cc
+++ b/src/profile-generator.cc
@@ -2178,7 +2178,6 @@ void V8HeapExplorer::ExtractPropertyReferences(JSObject* js_obj, int entry) {
         case HANDLER:  // only in lookup results, not in descriptors
         case INTERCEPTOR:  // only in lookup results, not in descriptors
         case MAP_TRANSITION:  // we do not care about transitions here...
-        case ELEMENTS_TRANSITION:
         case CONSTANT_TRANSITION:
         case NULL_DESCRIPTOR:  // ... and not about "holes"
           break;