Use source position table for crankshaft code.

src/crankshaft/x64/lithium-codegen-x64.cc

Index: src/crankshaft/x64/lithium-codegen-x64.cc
diff --git a/src/crankshaft/x64/lithium-codegen-x64.cc b/src/crankshaft/x64/lithium-codegen-x64.cc
index c82f6c1498054f5f69f042b0c93d59ce8de2f031..b79d787b1d4d4d2afad8c2ad43c6d14078a40622 100644
--- a/src/crankshaft/x64/lithium-codegen-x64.cc
+++ b/src/crankshaft/x64/lithium-codegen-x64.cc
@@ -66,6 +66,9 @@ void LCodeGen::FinishCode(Handle<Code> code) {
   DCHECK(is_done());
   code->set_stack_slots(GetTotalFrameSlotCount());
   code->set_safepoint_table_offset(safepoints_.GetCodeOffset());
+  Handle<ByteArray> source_positions =
+      source_position_table_builder_.ToSourcePositionTable();
+  code->set_source_position_table(*source_positions);
   PopulateDeoptimizationData(code);
 }
 
@@ -835,12 +838,6 @@ void LCodeGen::RecordSafepointWithRegisters(LPointerMap* pointers,
 }
 
 
-void LCodeGen::RecordAndWritePosition(int position) {
-  if (position == RelocInfo::kNoPosition) return;
-  masm()->positions_recorder()->RecordPosition(position);
-}
-
-
 static const char* LabelType(LLabel* label) {
   if (label->is_loop_header()) return " (loop header)";
   if (label->is_osr_entry()) return " (OSR entry)";