[interpreter] Fix debug stepping for generators.

src/interpreter/bytecode-array-builder.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 #define V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 
 #include "src/ast/ast.h"
 #include "src/interpreter/bytecode-array-writer.h"
 #include "src/interpreter/bytecode-register-allocator.h"
@@ skipping 243 matching lines @@
   // Creates a new handler table entry and returns a {hander_id} identifying the
   // entry, so that it can be referenced by above exception handling support.
   int NewHandlerEntry() { return handler_table_builder()->NewHandlerEntry(); }
 
   void InitializeReturnPosition(FunctionLiteral* literal);
 
   void SetStatementPosition(Statement* stmt);
   void SetExpressionPosition(Expression* expr);
   void SetExpressionAsStatementPosition(Expression* expr);
 
-  // Set position for return.
-  void SetReturnPosition();
-
   // Accessors
   TemporaryRegisterAllocator* temporary_register_allocator() {
     return &temporary_allocator_;
   }
   const TemporaryRegisterAllocator* temporary_register_allocator() const {
     return &temporary_allocator_;
   }
   Zone* zone() const { return zone_; }
 
   void EnsureReturn();
@@ skipping 34 matching lines @@
                                    BytecodeLabel* label);
 
 
   bool OperandIsValid(Bytecode bytecode, OperandScale operand_scale,
                       int operand_index, uint32_t operand_value) const;
   bool RegisterIsValid(Register reg, OperandSize reg_size) const;
 
   // Attach latest source position to |node|.
   void AttachSourceInfo(BytecodeNode* node);
 
+  // Set position for return.
+  void SetReturnPosition();
+
   // Gets a constant pool entry for the |object|.
   size_t GetConstantPoolEntry(Handle<Object> object);
 
   // Not implemented as the illegal bytecode is used inside internally
   // to indicate a bytecode field is not valid or an error has occured
   // during bytecode generation.
   BytecodeArrayBuilder& Illegal();
 
   void LeaveBasicBlock() { return_seen_in_block_ = false; }
 
@@ skipping 28 matching lines @@
   BytecodeSourceInfo latest_source_info_;
 
   DISALLOW_COPY_AND_ASSIGN(BytecodeArrayBuilder);
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_