[Interpreter] Add SetPendingMessage bytecode.

src/runtime/runtime-interpreter.cc

 // 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.
 
 #include "src/runtime/runtime-utils.h"
 
 #include <iomanip>
 
 #include "src/arguments.h"
 #include "src/frames-inl.h"
@@ skipping 137 matching lines @@
           interpreter::OperandScale::kSingle ||
       offset > bytecode_iterator.current_offset()) {
     OFStream os(stdout);
     // Print all output registers and accumulator.
     PrintRegisters(os, false, bytecode_iterator, accumulator);
     os << std::flush;
   }
   return isolate->heap()->undefined_value();
 }
 
-RUNTIME_FUNCTION(Runtime_InterpreterClearPendingMessage) {
-  SealHandleScope shs(isolate);
-  DCHECK_EQ(0, args.length());
-  Object* message = isolate->thread_local_top()->pending_message_obj_;
-  isolate->clear_pending_message();
-  return message;
-}
-
-RUNTIME_FUNCTION(Runtime_InterpreterSetPendingMessage) {
-  SealHandleScope shs(isolate);
-  DCHECK_EQ(1, args.length());
-  CONVERT_ARG_HANDLE_CHECKED(Object, message, 0);
-  isolate->thread_local_top()->pending_message_obj_ = *message;
-  return isolate->heap()->undefined_value();
-}
-
 RUNTIME_FUNCTION(Runtime_InterpreterAdvanceBytecodeOffset) {
   SealHandleScope shs(isolate);
   DCHECK_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(BytecodeArray, bytecode_array, 0);
   CONVERT_SMI_ARG_CHECKED(bytecode_offset, 1);
   interpreter::BytecodeArrayIterator it(bytecode_array);
   int offset = bytecode_offset - BytecodeArray::kHeaderSize + kHeapObjectTag;
   while (it.current_offset() < offset) it.Advance();
   DCHECK_EQ(offset, it.current_offset());
   it.Advance();  // Advance by one bytecode.
   offset = it.current_offset() + BytecodeArray::kHeaderSize - kHeapObjectTag;
   return Smi::FromInt(offset);
 }
 
 }  // namespace internal
 }  // namespace v8