Add tool to visualize machine code/lithium.

src/ia32/lithium-codegen-ia32.h

Index: src/ia32/lithium-codegen-ia32.h
diff --git a/src/ia32/lithium-codegen-ia32.h b/src/ia32/lithium-codegen-ia32.h
index 54ea04e7b9636f3b39d6e158c9567e7cbb50b967..78bc69de918fc5d338cdeeda5db2fb8c28b7b0b0 100644
--- a/src/ia32/lithium-codegen-ia32.h
+++ b/src/ia32/lithium-codegen-ia32.h
@@ -64,8 +64,7 @@ class LCodeGen: public LCodeGenBase {
         x87_stack_(assembler),
         safepoints_(info->zone()),
         resolver_(this),
-        expected_safepoint_kind_(Safepoint::kSimple),
-        old_position_(RelocInfo::kNoPosition) {
+        expected_safepoint_kind_(Safepoint::kSimple) {
     PopulateDeoptimizationLiteralsWithInlinedFunctions();
   }
 
@@ -308,9 +307,8 @@ class LCodeGen: public LCodeGenBase {
   void RecordSafepointWithRegisters(LPointerMap* pointers,
                                     int arguments,
                                     Safepoint::DeoptMode mode);
-  void RecordPosition(int position);
 
-  void RecordAndUpdatePosition(int position) V8_OVERRIDE;
+  void RecordAndWritePosition(int position) V8_OVERRIDE;
 
   static Condition TokenToCondition(Token::Value op, bool is_unsigned);
   void EmitGoto(int block);
@@ -472,8 +470,6 @@ class LCodeGen: public LCodeGenBase {
 
   Safepoint::Kind expected_safepoint_kind_;
 
-  int old_position_;
-
   class PushSafepointRegistersScope V8_FINAL  BASE_EMBEDDED {
    public:
     explicit PushSafepointRegistersScope(LCodeGen* codegen)