V8 Binding: Introduce toNativeWithTypeCheck

Source/bindings/v8/IDBBindingUtilities.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 418 matching lines @@
     v8::HandleScope handleScope(isolate);
     v8::Handle<v8::Value> v8Value(scriptValue.v8Value());
     return createIDBKeyFromValue(v8Value, isolate);
 }
 
 PassRefPtr<IDBKeyRange> scriptValueToIDBKeyRange(DOMRequestState* state, const ScriptValue& scriptValue)
 {
     v8::Isolate* isolate = state ? state->context()->GetIsolate() : v8::Isolate::GetCurrent();
     v8::HandleScope handleScope(isolate);
     v8::Handle<v8::Value> value(scriptValue.v8Value());
-    if (V8IDBKeyRange::hasInstance(value, isolate))
-        return V8IDBKeyRange::toNative(value.As<v8::Object>());
-    return 0;
+    return V8IDBKeyRange::toNativeWithTypeCheck(isolate, value);
 }
 
 #ifndef NDEBUG
 void assertPrimaryKeyValidOrInjectable(DOMRequestState* state, PassRefPtr<SharedBuffer> buffer, PassRefPtr<IDBKey> prpKey, const IDBKeyPath& keyPath)
 {
     RefPtr<IDBKey> key(prpKey);
 
     DOMRequestState::Scope scope(*state);
     v8::Isolate* isolate = state ? state->context()->GetIsolate() : v8::Isolate::GetCurrent();
 
     ScriptValue keyValue = idbKeyToScriptValue(state, key);
     ScriptValue scriptValue(deserializeIDBValueBuffer(buffer.get(), isolate), isolate);
 
     // This assertion is about already persisted data, so allow experimental types.
     const bool allowExperimentalTypes = true;
     RefPtr<IDBKey> expectedKey = createIDBKeyFromScriptValueAndKeyPath(scriptValue, keyPath, isolate, allowExperimentalTypes);
     ASSERT(!expectedKey || expectedKey->isEqual(key.get()));
 
     bool injected = injectV8KeyIntoV8Value(keyValue.v8Value(), scriptValue.v8Value(), keyPath, isolate);
     ASSERT_UNUSED(injected, injected);
 }
 #endif
 
 } // namespace WebCore