[runtime] Replace the EQUALS builtin with proper Object::Equals.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index f37671bedd48e9304a9832e526fa5a74f8af3e77..979020869a4dc27e4fb31db2973e089b96c200bd 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -1082,11 +1082,11 @@ bool Object::IsArgumentsMarker() const {
 }
 
 
-double Object::Number() {
+double Object::Number() const {
   DCHECK(IsNumber());
   return IsSmi()
-    ? static_cast<double>(reinterpret_cast<Smi*>(this)->value())
-    : reinterpret_cast<HeapNumber*>(this)->value();
+             ? static_cast<double>(reinterpret_cast<const Smi*>(this)->value())
+             : reinterpret_cast<const HeapNumber*>(this)->value();
 }
 
 
@@ -1567,6 +1567,12 @@ bool Simd128Value::Equals(Simd128Value* that) {
 }
 
 
+// static
+bool Simd128Value::Equals(Handle<Simd128Value> one, Handle<Simd128Value> two) {
+  return one->Equals(*two);
+}
+
+
 #define SIMD128_VALUE_EQUALS(TYPE, Type, type, lane_count, lane_type) \
   bool Type::Equals(Type* that) {                                     \
     for (int lane = 0; lane < lane_count; ++lane) {                   \
@@ -2053,6 +2059,12 @@ void Oddball::set_kind(byte value) {
 }
 
 
+// static
+Handle<Object> Oddball::ToNumber(Handle<Oddball> input) {
+  return handle(input->to_number(), input->GetIsolate());
+}
+
+
 ACCESSORS(Cell, value, Object, kValueOffset)
 ACCESSORS(PropertyCell, dependent_code, DependentCode, kDependentCodeOffset)
 ACCESSORS(PropertyCell, property_details_raw, Object, kDetailsOffset)