[interpreter] source positions should not be emitted for dead code.

src/interpreter/source-position-table.h

Index: src/interpreter/source-position-table.h
diff --git a/src/interpreter/source-position-table.h b/src/interpreter/source-position-table.h
index f05c0f7de57b2fa98cc41f98d88f1635e6ad1f11..933fb41e7bcd9e0f7588f60617890a09a1738b92 100644
--- a/src/interpreter/source-position-table.h
+++ b/src/interpreter/source-position-table.h
@@ -24,8 +24,9 @@ class SourcePositionTableBuilder {
   explicit SourcePositionTableBuilder(Isolate* isolate, Zone* zone)
       : isolate_(isolate), entries_(zone) {}
 
-  void AddStatementPosition(int bytecode_offset, int source_position);
-  void AddExpressionPosition(int bytecode_offset, int source_position);
+  void AddStatementPosition(size_t bytecode_offset, int source_position);
+  void AddExpressionPosition(size_t bytecode_offset, int source_position);
+  void RevertPosition(size_t bytecode_offset);
   Handle<FixedArray> ToFixedArray();
 
  private: