Separate Scope into DeclarationScope and Scope

src/interpreter/bytecode-generator.h

Index: src/interpreter/bytecode-generator.h
diff --git a/src/interpreter/bytecode-generator.h b/src/interpreter/bytecode-generator.h
index 5f6aac5178e02dc38cdbaba86235cdee14d5b57e..5b457284dcb7c4302dc349105e5cccfa6b3af516 100644
--- a/src/interpreter/bytecode-generator.h
+++ b/src/interpreter/bytecode-generator.h
@@ -174,7 +174,7 @@ class BytecodeGenerator final : public AstVisitor<BytecodeGenerator> {
   inline BytecodeArrayBuilder* builder() const { return builder_; }
   inline Isolate* isolate() const { return isolate_; }
   inline Zone* zone() const { return zone_; }
-  inline Scope* scope() const { return scope_; }
+  inline DeclarationScope* scope() const { return scope_; }
   inline CompilationInfo* info() const { return info_; }
 
   inline ControlScope* execution_control() const { return execution_control_; }
@@ -205,7 +205,7 @@ class BytecodeGenerator final : public AstVisitor<BytecodeGenerator> {
   Zone* zone_;
   BytecodeArrayBuilder* builder_;
   CompilationInfo* info_;
-  Scope* scope_;
+  DeclarationScope* scope_;
   GlobalDeclarationsBuilder* globals_builder_;
   ZoneVector<GlobalDeclarationsBuilder*> global_declarations_;
   ControlScope* execution_control_;