[Interpreter] Log source positions for bytecode arrays.

src/interpreter/source-position-table.h

 // Copyright 2016 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_SOURCE_POSITION_TABLE_H_
 #define V8_INTERPRETER_SOURCE_POSITION_TABLE_H_
 
 #include "src/assert-scope.h"
 #include "src/checks.h"
 #include "src/handles.h"
+#include "src/log.h"
 #include "src/zone-containers.h"
 
 namespace v8 {
 namespace internal {
 
 class BytecodeArray;
 class ByteArray;
 class Isolate;
 class Zone;
 
 namespace interpreter {
 
 struct PositionTableEntry {
   PositionTableEntry()
       : bytecode_offset(0), source_position(0), is_statement(false) {}
   PositionTableEntry(int bytecode, int source, bool statement)
       : bytecode_offset(bytecode),
         source_position(source),
         is_statement(statement) {}
 
   int bytecode_offset;
   int source_position;
   bool is_statement;
 };
 
-class SourcePositionTableBuilder {
+class SourcePositionTableBuilder : public PositionsRecorder {
  public:
   explicit SourcePositionTableBuilder(Isolate* isolate, Zone* zone)
       : isolate_(isolate),
         bytes_(zone),
 #ifdef ENABLE_SLOW_DCHECKS
         raw_entries_(zone),
 #endif
         previous_() {
   }
 
@@ skipping 39 matching lines @@
   int index_;
   PositionTableEntry current_;
   DisallowHeapAllocation no_gc;
 };
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_SOURCE_POSITION_TABLE_H_