Revert of [intrinsic] Drop the %_ValueOf intrinsic.

src/full-codegen/arm/full-codegen-arm.cc

Index: src/full-codegen/arm/full-codegen-arm.cc
diff --git a/src/full-codegen/arm/full-codegen-arm.cc b/src/full-codegen/arm/full-codegen-arm.cc
index 1dc925842b4144ace32b8b2ce4bff537ac1117f8..e5f82948ab8d90ff126cbcc278a4c3338e85be2e 100644
--- a/src/full-codegen/arm/full-codegen-arm.cc
+++ b/src/full-codegen/arm/full-codegen-arm.cc
@@ -2853,6 +2853,23 @@
   // All done.
   __ bind(&done);
 
+  context()->Plug(r0);
+}
+
+
+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(r0, &done);
+  // If the object is not a value type, return the object.
+  __ CompareObjectType(r0, r1, r1, JS_VALUE_TYPE);
+  __ ldr(r0, FieldMemOperand(r0, JSValue::kValueOffset), eq);
+
+  __ bind(&done);
   context()->Plug(r0);
 }