Use source position table for crankshaft code.

src/crankshaft/lithium.cc

Index: src/crankshaft/lithium.cc
diff --git a/src/crankshaft/lithium.cc b/src/crankshaft/lithium.cc
index 4b3e0bc63a8d7279d37bcf42946215b5a501578d..8804da7838eee3d53b443147aa2fdd933d208394 100644
--- a/src/crankshaft/lithium.cc
+++ b/src/crankshaft/lithium.cc
@@ -448,13 +448,14 @@ LChunk* LChunk::NewChunk(HGraph* graph) {
 Handle<Code> LChunk::Codegen() {
   MacroAssembler assembler(info()->isolate(), NULL, 0,
                            CodeObjectRequired::kYes);
-  LOG_CODE_EVENT(info()->isolate(),
-                 CodeStartLinePosInfoRecordEvent(
-                     assembler.positions_recorder()));
   // Code serializer only takes unoptimized code.
   DCHECK(!info()->will_serialize());
   LCodeGen generator(this, &assembler, info());
 
+  LOG_CODE_EVENT(info()->isolate(),
+                 CodeStartLinePosInfoRecordEvent(
+                     generator.source_position_table_builder()));
+
   MarkEmptyBlocks();
 
   if (generator.GenerateCode()) {
@@ -465,7 +466,7 @@ Handle<Code> LChunk::Codegen() {
     CommitDependencies(code);
     code->set_is_crankshafted(true);
     void* jit_handler_data =
-        assembler.positions_recorder()->DetachJITHandlerData();
+        generator.source_position_table_builder()->DetachJITHandlerData();
     LOG_CODE_EVENT(info()->isolate(),
                    CodeEndLinePosInfoRecordEvent(AbstractCode::cast(*code),
                                                  jit_handler_data));