Use source position table for crankshaft code.

src/crankshaft/lithium-codegen.cc

Index: src/crankshaft/lithium-codegen.cc
diff --git a/src/crankshaft/lithium-codegen.cc b/src/crankshaft/lithium-codegen.cc
index 4bf2100f07ee5b4733136712efbd171af82eda25..c2401b2400d50c58753a2126397a3a17c57b8bbd 100644
--- a/src/crankshaft/lithium-codegen.cc
+++ b/src/crankshaft/lithium-codegen.cc
@@ -45,7 +45,6 @@ HGraph* LCodeGenBase::graph() const {
   return chunk()->graph();
 }
 
-
 LCodeGenBase::LCodeGenBase(LChunk* chunk, MacroAssembler* assembler,
                            CompilationInfo* info)
     : chunk_(static_cast<LPlatformChunk*>(chunk)),
@@ -61,8 +60,8 @@ LCodeGenBase::LCodeGenBase(LChunk* chunk, MacroAssembler* assembler,
       translations_(info->zone()),
       inlined_function_count_(0),
       last_lazy_deopt_pc_(0),
-      osr_pc_offset_(-1) {}
-
+      osr_pc_offset_(-1),
+      source_position_table_builder_(info->isolate(), info->zone()) {}
 
 bool LCodeGenBase::GenerateBody() {
   DCHECK(is_generating());
@@ -137,6 +136,10 @@ void LCodeGenBase::CheckEnvironmentUsage() {
 #endif
 }
 
+void LCodeGenBase::RecordAndWritePosition(int pos) {
+  if (pos == RelocInfo::kNoPosition) return;
+  source_position_table_builder_.AddPosition(masm_->pc_offset(), pos, false);
+}
 
 void LCodeGenBase::Comment(const char* format, ...) {
   if (!FLAG_code_comments) return;
@@ -371,5 +374,6 @@ Deoptimizer::DeoptInfo LCodeGenBase::MakeDeoptInfo(
                                     deopt_reason, deopt_id);
   return deopt_info;
 }
+
 }  // namespace internal
 }  // namespace v8