[Interpreter] Add support for new local function context creation.

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 3ce65322cc4314c81798e37397b6531d70583451..2fe8b324d8cc539cd7f952631373b2b8845e9a1c 100644
--- a/src/interpreter/bytecode-generator.h
+++ b/src/interpreter/bytecode-generator.h
@@ -28,15 +28,19 @@ class BytecodeGenerator : public AstVisitor {
   void VisitDeclarations(ZoneList<Declaration*>* declarations) override;
 
  private:
+  class ContextScope;
   class ControlScope;
   class ControlScopeForIteration;
 
+  void MakeBytecodeBody();
+
   DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
 
   void VisitArithmeticExpression(BinaryOperation* binop);
   void VisitPropertyLoad(Register obj, Property* expr);
   void VisitVariableLoad(Variable* variable, FeedbackVectorSlot slot);
   void VisitVariableAssignment(Variable* variable, FeedbackVectorSlot slot);
+  void VisitNewLocalFunctionContext();
 
   // Dispatched from VisitUnaryOperation.
   void VisitVoid(UnaryOperation* expr);
@@ -44,18 +48,23 @@ class BytecodeGenerator : public AstVisitor {
   void VisitNot(UnaryOperation* expr);
 
   inline BytecodeArrayBuilder* builder() { return &builder_; }
+
   inline Scope* scope() const { return scope_; }
   inline void set_scope(Scope* scope) { scope_ = scope; }
-  inline ControlScope* control_scope() const { return control_scope_; }
-  inline void set_control_scope(ControlScope* scope) { control_scope_ = scope; }
   inline CompilationInfo* info() const { return info_; }
   inline void set_info(CompilationInfo* info) { info_ = info; }
-  ZoneVector<Handle<Object>>* globals() { return &globals_; }
 
-  LanguageMode language_mode() const;
+  inline ControlScope* control_scope() const { return control_scope_; }
+  inline void set_control_scope(ControlScope* scope) { control_scope_ = scope; }
+  inline Register current_context() const { return current_context_; }
+  inline void set_current_context(Register context) {
+    current_context_ = context;
+  }
+
+  ZoneVector<Handle<Object>>* globals() { return &globals_; }
+  inline LanguageMode language_mode() const;
   Strength language_mode_strength() const;
   int feedback_index(FeedbackVectorSlot slot) const;
-  Register current_context() const;
 
   BytecodeArrayBuilder builder_;
   CompilationInfo* info_;
@@ -63,7 +72,6 @@ class BytecodeGenerator : public AstVisitor {
   ZoneVector<Handle<Object>> globals_;
   ControlScope* control_scope_;
 
-  // TODO(rmcilroy): Encapsulate this in an environment object.
   Register current_context_;
 };