[intrinsic] Drop the %_ValueOf intrinsic.

src/full-codegen/x64/full-codegen-x64.cc

Index: src/full-codegen/x64/full-codegen-x64.cc
diff --git a/src/full-codegen/x64/full-codegen-x64.cc b/src/full-codegen/x64/full-codegen-x64.cc
index 0e5cf985b8d9286f4192c9d6c6db93fcbae0b2e7..cf59e66abdcb7aec5469fe61aff43f3c53ef31ff 100644
--- a/src/full-codegen/x64/full-codegen-x64.cc
+++ b/src/full-codegen/x64/full-codegen-x64.cc
@@ -2734,25 +2734,6 @@ void FullCodeGenerator::EmitClassOf(CallRuntime* expr) {
 }
 
 
-void FullCodeGenerator::EmitValueOf(CallRuntime* expr) {
-  ZoneList<Expression*>* args = expr->arguments();
-  DCHECK(args->length() == 1);
-
-  VisitForAccumulatorValue(args->at(0));  // Load the object.
-
-  Label done;
-  // If the object is a smi return the object.
-  __ JumpIfSmi(rax, &done);
-  // If the object is not a value type, return the object.
-  __ CmpObjectType(rax, JS_VALUE_TYPE, rbx);
-  __ j(not_equal, &done);
-  __ movp(rax, FieldOperand(rax, JSValue::kValueOffset));
-
-  __ bind(&done);
-  context()->Plug(rax);
-}
-
-
 void FullCodeGenerator::EmitStringCharFromCode(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK(args->length() == 1);