[strong] Stricter check for referring to other classes inside methods.

src/variables.cc

Index: src/variables.cc
diff --git a/src/variables.cc b/src/variables.cc
index c0b8bd784353aa0ad349689b30ce7578de80e116..a6f71564960221a9e602a9c25456c5dd4eb90b18 100644
--- a/src/variables.cc
+++ b/src/variables.cc
@@ -34,7 +34,8 @@ const char* Variable::Mode2String(VariableMode mode) {
 
 Variable::Variable(Scope* scope, const AstRawString* name, VariableMode mode,
                    Kind kind, InitializationFlag initialization_flag,
-                   MaybeAssignedFlag maybe_assigned_flag)
+                   MaybeAssignedFlag maybe_assigned_flag,
+                   int consecutive_declaration_group_start)
     : scope_(scope),
       name_(name),
       mode_(mode),
@@ -49,7 +50,9 @@ Variable::Variable(Scope* scope, const AstRawString* name, VariableMode mode,
       force_context_allocation_(false),
       is_used_(false),
       initialization_flag_(initialization_flag),
-      maybe_assigned_(maybe_assigned_flag) {
+      maybe_assigned_(maybe_assigned_flag),
+      consecutive_declaration_group_start_(consecutive_declaration_group_start),
+      corresponding_outer_class_variable_(nullptr) {
   // Var declared variables never need initialization.
   DCHECK(!(mode == VAR && initialization_flag == kNeedsInitialization));
 }