[interpreter, debugger] support debug breaks via bytecode array copy

src/factory.h

 // Copyright 2014 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_FACTORY_H_
 #define V8_FACTORY_H_
 
 #include "src/isolate.h"
 #include "src/messages.h"
 #include "src/type-feedback-vector.h"
@@ skipping 523 matching lines @@
                        Handle<Object> self_reference,
                        bool immovable = false,
                        bool crankshafted = false,
                        int prologue_offset = Code::kPrologueOffsetNotSet,
                        bool is_debug = false);
 
   Handle<Code> CopyCode(Handle<Code> code);
 
   Handle<Code> CopyCode(Handle<Code> code, Vector<byte> reloc_info);
 
+  Handle<BytecodeArray> CopyBytecodeArray(Handle<BytecodeArray>);
+
   // Interface for creating error objects.
   Handle<Object> NewError(Handle<JSFunction> constructor,
                           Handle<String> message);
 
   Handle<Object> NewInvalidStringLengthError() {
     return NewRangeError(MessageTemplate::kInvalidStringLength);
   }
 
   Handle<Object> NewError(Handle<JSFunction> constructor,
                           MessageTemplate::Template template_index,
@@ skipping 147 matching lines @@
   // Create a JSArray with no elements and no length.
   Handle<JSArray> NewJSArray(ElementsKind elements_kind,
                              Strength strength = Strength::WEAK,
                              PretenureFlag pretenure = NOT_TENURED);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_FACTORY_H_