Encode interpreter::SourcePositionTable as variable-length ints.

src/interpreter/bytecode-array-builder.cc

Index: src/interpreter/bytecode-array-builder.cc
diff --git a/src/interpreter/bytecode-array-builder.cc b/src/interpreter/bytecode-array-builder.cc
index f277d7ce187e0a5ba975b351e7190c731fea79ca..7407675a66e75125bee616058da3668a4764928d 100644
--- a/src/interpreter/bytecode-array-builder.cc
+++ b/src/interpreter/bytecode-array-builder.cc
@@ -124,8 +124,8 @@ Handle<BytecodeArray> BytecodeArrayBuilder::ToBytecodeArray() {
   int frame_size = register_count * kPointerSize;
   Handle<FixedArray> constant_pool = constant_array_builder()->ToFixedArray();
   Handle<FixedArray> handler_table = handler_table_builder()->ToHandlerTable();
-  Handle<FixedArray> source_position_table =
-      source_position_table_builder()->ToFixedArray();
+  Handle<ByteArray> source_position_table =
+      source_position_table_builder()->ToSourcePositionTable();
   Handle<BytecodeArray> output = isolate_->factory()->NewBytecodeArray(
       bytecode_size, &bytecodes_.front(), frame_size, parameter_count(),
       constant_pool);