Implement handlified String::Equals and Name::Equals.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index eafc86c2d7f5752f6ef37a78fffffced490575cf..2c3b3b7d8409c853e0edb8d4f0b1a66ce53d3e7d 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -2995,7 +2995,8 @@ bool Value::StrictEquals(Handle<Value> that) const {
     return other->IsNumber() && obj->Number() == other->Number();
   } else if (obj->IsString()) {
     return other->IsString() &&
-        i::String::cast(*obj)->Equals(i::String::cast(*other));
+        i::String::Equals(i::Handle<i::String>::cast(obj),
+                          i::Handle<i::String>::cast(other));
   } else if (obj->IsUndefined() || obj->IsUndetectableObject()) {
     return other->IsUndefined() || other->IsUndetectableObject();
   } else {