[interpreter] First implementation of stack unwinding.

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 a4b9caba0fbf39fcec094b93a35cb8d7da33c7a1..d07b42391584c59dfa2f5e9641b287107eae2f29 100644
--- a/src/interpreter/bytecode-generator.h
+++ b/src/interpreter/bytecode-generator.h
@@ -81,6 +81,7 @@ class BytecodeGenerator final : public AstVisitor {
   void VisitBuildLocalActivationContext();
   void VisitBlockDeclarationsAndStatements(Block* stmt);
   void VisitNewLocalBlockContext(Scope* scope);
+  void VisitNewLocalCatchContext(Variable* variable);
   void VisitFunctionClosureForContext();
   void VisitSetHomeObject(Register value, Register home_object,
                           ObjectLiteralProperty* property, int slot_number = 0);
@@ -89,6 +90,9 @@ class BytecodeGenerator final : public AstVisitor {
                                   Register value_out);
   void VisitForInAssignment(Expression* expr, FeedbackVectorSlot slot);
 
+  // Visit a statement and switch scopes, the context is in the accumulator.
+  void VisitInScope(Statement* stmt, Scope* scope);
+
   // Visitors for obtaining expression result in the accumulator, in a
   // register, or just getting the effect.
   void VisitForAccumulatorValue(Expression* expression);