Use source position table for crankshaft code.

src/crankshaft/arm/lithium-codegen-arm.h

Index: src/crankshaft/arm/lithium-codegen-arm.h
diff --git a/src/crankshaft/arm/lithium-codegen-arm.h b/src/crankshaft/arm/lithium-codegen-arm.h
index 30a26f23f8b836d01d4aa2ff46700241c8ec82ea..f41b180efcb590957d1b2a64115d202409dec690 100644
--- a/src/crankshaft/arm/lithium-codegen-arm.h
+++ b/src/crankshaft/arm/lithium-codegen-arm.h
@@ -253,7 +253,7 @@ class LCodeGen: public LCodeGenBase {
 
   void EmitIntegerMathAbs(LMathAbs* instr);
 
-  // Support for recording safepoint and position information.
+  // Support for recording safepoint information.
   void RecordSafepoint(LPointerMap* pointers,
                        Safepoint::Kind kind,
                        int arguments,
@@ -264,8 +264,6 @@ class LCodeGen: public LCodeGenBase {
                                     int arguments,
                                     Safepoint::DeoptMode mode);
 
-  void RecordAndWritePosition(int position) override;
-
   static Condition TokenToCondition(Token::Value op, bool is_unsigned);
   void EmitGoto(int block);