Delete unused TypeInfo class

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2592 matching lines @@
 
 bool Value::IsExternal() const {
   return Utils::OpenHandle(this)->IsExternal();
 }
 
 
 bool Value::IsInt32() const {
   i::Handle<i::Object> obj = Utils::OpenHandle(this);
   if (obj->IsSmi()) return true;
   if (obj->IsNumber()) {
-    double value = obj->Number();
-    static const i::DoubleRepresentation minus_zero(-0.0);
-    i::DoubleRepresentation rep(value);
-    if (rep.bits == minus_zero.bits) {
-      return false;
-    }
-    return i::FastI2D(i::FastD2I(value)) == value;
+    return i::IsInt32Double(obj->Number());
   }
   return false;
 }
 
 
 bool Value::IsUint32() const {
   i::Handle<i::Object> obj = Utils::OpenHandle(this);
   if (obj->IsSmi()) return i::Smi::cast(*obj)->value() >= 0;
   if (obj->IsNumber()) {
     double value = obj->Number();
-    static const i::DoubleRepresentation minus_zero(-0.0);
-    i::DoubleRepresentation rep(value);
-    if (rep.bits == minus_zero.bits) {
-      return false;
-    }
-    return i::FastUI2D(i::FastD2UI(value)) == value;
+    return !i::IsMinusZero(value) &&
+           value >= 0 &&
+           value <= i::kMaxUInt32 &&
+           value == i::FastUI2D(i::FastD2UI(value));
   }
   return false;
 }
 
 
 bool Value::IsDate() const {
   i::Isolate* isolate = i::Isolate::Current();
   i::Handle<i::Object> obj = Utils::OpenHandle(this);
   return obj->HasSpecificClassOf(isolate->heap()->Date_string());
 }
@@ skipping 5125 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal