Remove CONST_LEGACY VariableMode

src/profiler/heap-snapshot-generator.cc

Index: src/profiler/heap-snapshot-generator.cc
diff --git a/src/profiler/heap-snapshot-generator.cc b/src/profiler/heap-snapshot-generator.cc
index 9273168f808b3d5c16b21cc0fb0656eeeed70f4a..9f36797ff3cf119e30cc28cae08259f62107de81 100644
--- a/src/profiler/heap-snapshot-generator.cc
+++ b/src/profiler/heap-snapshot-generator.cc
@@ -1216,8 +1216,7 @@ void V8HeapExplorer::ExtractContextReferences(int entry, Context* context) {
     }
     if (scope_info->HasFunctionName()) {
       String* name = scope_info->FunctionName();
-      VariableMode mode;
-      int idx = scope_info->FunctionContextSlotIndex(name, &mode);
+      int idx = scope_info->FunctionContextSlotIndex(name);
       if (idx >= 0) {
         SetContextReference(context, entry, name, context->get(idx),
                             Context::OffsetOfElementAt(idx));