--debug-code: sanity-checking instrumentation for Lithium object accesses

src/x64/lithium-codegen-x64.h

Index: src/x64/lithium-codegen-x64.h
diff --git a/src/x64/lithium-codegen-x64.h b/src/x64/lithium-codegen-x64.h
index fb58a53cf2c65cc875ac6dfcc3ca228a60db6b54..a368c615f8a1989d5d28dcb0f4985c532def040e 100644
--- a/src/x64/lithium-codegen-x64.h
+++ b/src/x64/lithium-codegen-x64.h
@@ -104,6 +104,15 @@ class LCodeGen: public LCodeGenBase {
   // Emit frame translation commands for an environment.
   void WriteTranslation(LEnvironment* environment, Translation* translation);
 
+#ifdef DEBUG
+  void EmitKeyedAccessCheck(LOperand* elements, Operand operand);
+  void EmitObjectAccessChecks(HObjectAccess* access, Register object,
+                              bool is_store);
+  void EmitCheckMap(Register object, Handle<Map> map);
+  void EmitCheckInstanceType(Register object, InstanceType type,
+                             Condition condition = equal);
+#endif
+
   // Declare methods that deal with the individual node types.
 #define DECLARE_DO(type) void Do##type(L##type* node);
   LITHIUM_CONCRETE_INSTRUCTION_LIST(DECLARE_DO)