Revert of [intrinsic] Drop the %_ValueOf intrinsic.

src/full-codegen/arm64/full-codegen-arm64.cc

Index: src/full-codegen/arm64/full-codegen-arm64.cc
diff --git a/src/full-codegen/arm64/full-codegen-arm64.cc b/src/full-codegen/arm64/full-codegen-arm64.cc
index 03505872cfb82e59c7c39ad5b3d4aec4470812e5..ef03d9ade40dc2d2e44826791f38894c6cd95e97 100644
--- a/src/full-codegen/arm64/full-codegen-arm64.cc
+++ b/src/full-codegen/arm64/full-codegen-arm64.cc
@@ -2759,6 +2759,24 @@
   // All done.
   __ Bind(&done);
 
+  context()->Plug(x0);
+}
+
+
+void FullCodeGenerator::EmitValueOf(CallRuntime* expr) {
+  ASM_LOCATION("FullCodeGenerator::EmitValueOf");
+  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(x0, &done);
+  // If the object is not a value type, return the object.
+  __ JumpIfNotObjectType(x0, x10, x11, JS_VALUE_TYPE, &done);
+  __ Ldr(x0, FieldMemOperand(x0, JSValue::kValueOffset));
+
+  __ Bind(&done);
   context()->Plug(x0);
 }