Make HTypeofIsAndBranch accept any representation input

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 f3f202a277ffa1b951cf498bb47096b7853581ee..bdaeaeff697d38244f4eb427cdfe42d43bfe4c08 100644
--- a/src/x64/lithium-codegen-x64.h
+++ b/src/x64/lithium-codegen-x64.h
@@ -274,10 +274,7 @@ class LCodeGen: public LCodeGenBase {
   // Emits optimized code for typeof x == "y".  Modifies input register.
   // Returns the condition on which a final split to
   // true and false label should be made, to optimize fallthrough.
-  Condition EmitTypeofIs(Label* true_label,
-                         Label* false_label,
-                         Register input,
-                         Handle<String> type_name);
+  Condition EmitTypeofIs(LTypeofIsAndBranch* instr, Register input);
 
   // Emits optimized code for %_IsObject(x).  Preserves input register.
   // Returns the condition on which a final split to