IDL: Drop redundant null check for string and wrapper type attributes

Source/bindings/tests/results/V8TestObject.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file has been auto-generated by code_generator_v8.py. DO NOT MODIFY!
 
 #include "config.h"
 #include "V8TestObject.h"
 
 #include "bindings/core/v8/V8HTMLCollection.h"
@@ skipping 1354 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::readonlyEventTargetAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void readonlyEventTargetOrNullAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toNative(holder);
-    RefPtrWillBeRawPtr<EventTarget> cppValue(impl->readonlyEventTargetOrNullAttribute());
-    if (!cppValue) {
-        v8SetReturnValueNull(info);
-        return;
-    }
-    v8SetReturnValueFast(info, WTF::getPtr(cppValue.release()), impl);
+    v8SetReturnValueFast(info, WTF::getPtr(impl->readonlyEventTargetOrNullAttribute()), impl);
 }
 
 static void readonlyEventTargetOrNullAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::readonlyEventTargetOrNullAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void readonlyWindowAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
@@ skipping 122 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::floatArrayAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void stringOrNullAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toNative(holder);
-    String cppValue(impl->stringOrNullAttribute());
-    if (!cppValue) {
-        v8SetReturnValueNull(info);
-        return;
-    }
-    v8SetReturnValueString(info, cppValue, info.GetIsolate());
+    v8SetReturnValueStringOrNull(info, impl->stringOrNullAttribute(), info.GetIsolate());
 }
 
 static void stringOrNullAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::stringOrNullAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void stringOrNullAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
@@ skipping 44 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::longOrNullAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceOrNullAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toNative(holder);
-    RefPtr<TestInterfaceImplementation> cppValue(impl->testInterfaceOrNullAttribute());
-    if (!cppValue) {
-        v8SetReturnValueNull(info);
-        return;
-    }
-    v8SetReturnValueFast(info, WTF::getPtr(cppValue.release()), impl);
+    v8SetReturnValueFast(info, WTF::getPtr(impl->testInterfaceOrNullAttribute()), impl);
 }
 
 static void testInterfaceOrNullAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::testInterfaceOrNullAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceOrNullAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
@@ skipping 305 matching lines @@
     V8HiddenValue::deleteHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "cachedArrayAttribute")); // Invalidate the cached value.
 }
 
 static void cachedArrayAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::cachedArrayAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
+static void cachedStringOrNoneAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
+{
+    v8::Handle<v8::Object> holder = info.Holder();
+    v8::Handle<v8::String> propertyName = v8AtomicString(info.GetIsolate(), "cachedStringOrNoneAttribute");
+    TestObject* impl = V8TestObject::toNative(holder);
+    if (!impl->isStringDirty()) {
+        v8::Handle<v8::Value> v8Value = V8HiddenValue::getHiddenValue(info.GetIsolate(), holder, propertyName);
+        if (!v8Value.IsEmpty()) {
+            v8SetReturnValue(info, v8Value);
+            return;
+        }
+    }
+    String cppValue(impl->cachedStringOrNoneAttribute());
+    V8HiddenValue::setHiddenValue(info.GetIsolate(), holder, propertyName, cppValue.isNull() ? v8::Handle<v8::Value>(v8::Null(info.GetIsolate())) : v8String(info.GetIsolate(), cppValue));
+    v8SetReturnValueStringOrNull(info, cppValue, info.GetIsolate());
+}
+
+static void cachedStringOrNoneAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
+{
+    TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
+    TestObjectV8Internal::cachedStringOrNoneAttributeAttributeGetter(info);
+    TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
+}
+
+static void cachedStringOrNoneAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
+{
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObject* impl = V8TestObject::toNative(holder);
+    TOSTRING_VOID(V8StringResource<WithNullCheck>, cppValue, v8Value);
+    impl->setCachedStringOrNoneAttribute(cppValue);
+    V8HiddenValue::deleteHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "cachedStringOrNoneAttribute")); // Invalidate the cached value.
+}
+
+static void cachedStringOrNoneAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
+{
+    TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
+    TestObjectV8Internal::cachedStringOrNoneAttributeAttributeSetter(v8Value, info);
+    TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
+}
+
 static void callWithExecutionContextAnyAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toNative(holder);
     ExecutionContext* executionContext = currentExecutionContext(info.GetIsolate());
     v8SetReturnValue(info, impl->callWithExecutionContextAnyAttribute(executionContext).v8Value());
 }
 
 static void callWithExecutionContextAnyAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
@@ skipping 2312 matching lines @@
     impl->setTreatReturnedNullStringAsUndefinedStringAttribute(cppValue);
 }
 
 static void treatReturnedNullStringAsUndefinedStringAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::treatReturnedNullStringAsUndefinedStringAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
+static void cachedTreatReturnedNullStringAsUndefinedStringAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
+{
+    v8::Handle<v8::Object> holder = info.Holder();
+    v8::Handle<v8::String> propertyName = v8AtomicString(info.GetIsolate(), "cachedTreatReturnedNullStringAsUndefinedStringAttribute");
+    TestObject* impl = V8TestObject::toNative(holder);
+    if (!impl->isStringDirty()) {
+        v8::Handle<v8::Value> v8Value = V8HiddenValue::getHiddenValue(info.GetIsolate(), holder, propertyName);
+        if (!v8Value.IsEmpty()) {
+            v8SetReturnValue(info, v8Value);
+            return;
+        }
+    }
+    String cppValue(impl->cachedTreatReturnedNullStringAsUndefinedStringAttribute());
+    V8HiddenValue::setHiddenValue(info.GetIsolate(), holder, propertyName, cppValue.isNull() ? v8Undefined() : v8String(info.GetIsolate(), cppValue));
+    v8SetReturnValueStringOrUndefined(info, cppValue, info.GetIsolate());
+}
+
+static void cachedTreatReturnedNullStringAsUndefinedStringAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
+{
+    TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
+    TestObjectV8Internal::cachedTreatReturnedNullStringAsUndefinedStringAttributeAttributeGetter(info);
+    TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
+}
+
+static void cachedTreatReturnedNullStringAsUndefinedStringAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
+{
+    v8::Handle<v8::Object> holder = info.Holder();
+    TestObject* impl = V8TestObject::toNative(holder);
+    TOSTRING_VOID(V8StringResource<>, cppValue, v8Value);
+    impl->setCachedTreatReturnedNullStringAsUndefinedStringAttribute(cppValue);
+    V8HiddenValue::deleteHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "cachedTreatReturnedNullStringAsUndefinedStringAttribute")); // Invalidate the cached value.
+}
+
+static void cachedTreatReturnedNullStringAsUndefinedStringAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
+{
+    TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
+    TestObjectV8Internal::cachedTreatReturnedNullStringAsUndefinedStringAttributeAttributeSetter(v8Value, info);
+    TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
+}
+
 static void treatReturnedNullStringAsNullByteStringAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toNative(holder);
     v8SetReturnValueStringOrNull(info, impl->treatReturnedNullStringAsNullByteStringAttribute(), info.GetIsolate());
 }
 
 static void treatReturnedNullStringAsNullByteStringAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
@@ skipping 168 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::typeCheckingInterfaceTestInterfaceAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void typeCheckingInterfaceTestInterfaceOrNullAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toNative(holder);
-    RefPtr<TestInterfaceImplementation> cppValue(impl->typeCheckingInterfaceTestInterfaceOrNullAttribute());
-    if (!cppValue) {
-        v8SetReturnValueNull(info);
-        return;
-    }
-    v8SetReturnValueFast(info, WTF::getPtr(cppValue.release()), impl);
+    v8SetReturnValueFast(info, WTF::getPtr(impl->typeCheckingInterfaceTestInterfaceOrNullAttribute()), impl);
 }
 
 static void typeCheckingInterfaceTestInterfaceOrNullAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::typeCheckingInterfaceTestInterfaceOrNullAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void typeCheckingInterfaceTestInterfaceOrNullAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
@@ skipping 106 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::unforgeableLongAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void activityLoggingSetterOnlyLogPreviousValueAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toNative(holder);
-    v8SetReturnValueInt(info, impl->activityLoggingSetterOnlyLogPreviousValueAttribute());
+    String cppValue(impl->activityLoggingSetterOnlyLogPreviousValueAttribute());
+    v8SetReturnValueStringOrNull(info, cppValue, info.GetIsolate());
 }
 
 static void activityLoggingSetterOnlyLogPreviousValueAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::activityLoggingSetterOnlyLogPreviousValueAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void activityLoggingSetterOnlyLogPreviousValueAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
-    ExceptionState exceptionState(ExceptionState::SetterContext, "activityLoggingSetterOnlyLogPreviousValueAttribute", "TestObject", holder, info.GetIsolate());
     TestObject* impl = V8TestObject::toNative(holder);
-    TONATIVE_VOID_EXCEPTIONSTATE(int, cppValue, toInt32(v8Value, exceptionState), exceptionState);
+    TOSTRING_VOID(V8StringResource<WithNullCheck>, cppValue, v8Value);
     impl->setActivityLoggingSetterOnlyLogPreviousValueAttribute(cppValue);
 }
 
 static void activityLoggingSetterOnlyLogPreviousValueAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     ScriptState* scriptState = ScriptState::from(info.GetIsolate()->GetCurrentContext());
     V8PerContextData* contextData = scriptState->perContextData();
     if (scriptState->world().isIsolatedWorld() && contextData && contextData->activityLogger()) {
         TestObject* impl = V8TestObject::toNative(info.Holder());
-        int original = impl->activityLoggingSetterOnlyLogPreviousValueAttribute();
-        v8::Handle<v8::Value> originalValue = v8::Integer::New(info.GetIsolate(), impl->activityLoggingSetterOnlyLogPreviousValueAttribute());
+        String cppValue(impl->activityLoggingSetterOnlyLogPreviousValueAttribute());
+        v8::Handle<v8::Value> originalValue = cppValue.isNull() ? v8::Handle<v8::Value>(v8::Null(info.GetIsolate())) : v8String(info.GetIsolate(), cppValue);
         contextData->activityLogger()->logSetter("TestObject.activityLoggingSetterOnlyLogPreviousValueAttribute", v8Value, originalValue);
     }
     TestObjectV8Internal::activityLoggingSetterOnlyLogPreviousValueAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void activityLoggingLogPreviousValueInterfaceAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toNative(holder);
-    v8SetReturnValueFast(info, WTF::getPtr(impl->activityLoggingLogPreviousValueInterfaceAttribute()), impl);
+    RefPtr<TestInterfaceEmpty> cppValue(impl->activityLoggingLogPreviousValueInterfaceAttribute());
+    v8SetReturnValueFast(info, WTF::getPtr(cppValue.release()), impl);
 }
 
 static void activityLoggingLogPreviousValueInterfaceAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     ScriptState* scriptState = ScriptState::from(info.GetIsolate()->GetCurrentContext());
     V8PerContextData* contextData = scriptState->perContextData();
     if (scriptState->world().isIsolatedWorld() && contextData && contextData->activityLogger())
         contextData->activityLogger()->logGetter("TestObject.activityLoggingLogPreviousValueInterfaceAttribute");
     TestObjectV8Internal::activityLoggingLogPreviousValueInterfaceAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void activityLoggingLogPreviousValueInterfaceAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toNative(holder);
     TONATIVE_VOID(TestInterfaceEmpty*, cppValue, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), v8Value));
     impl->setActivityLoggingLogPreviousValueInterfaceAttribute(WTF::getPtr(cppValue));
 }
 
 static void activityLoggingLogPreviousValueInterfaceAttributeAttributeSetterCallback(v8::Local<v8::String>, v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     ScriptState* scriptState = ScriptState::from(info.GetIsolate()->GetCurrentContext());
     V8PerContextData* contextData = scriptState->perContextData();
     if (scriptState->world().isIsolatedWorld() && contextData && contextData->activityLogger()) {
         TestObject* impl = V8TestObject::toNative(info.Holder());
-        RefPtr<TestInterfaceEmpty> original = impl->activityLoggingLogPreviousValueInterfaceAttribute();
-        v8::Handle<v8::Value> originalValue = toV8(impl->activityLoggingLogPreviousValueInterfaceAttribute(), info.Holder(), info.GetIsolate());
+        RefPtr<TestInterfaceEmpty> cppValue(impl->activityLoggingLogPreviousValueInterfaceAttribute());
+        v8::Handle<v8::Value> originalValue = toV8(cppValue, info.Holder(), info.GetIsolate());
         contextData->activityLogger()->logSetter("TestObject.activityLoggingLogPreviousValueInterfaceAttribute", v8Value, originalValue);
     }
     TestObjectV8Internal::activityLoggingLogPreviousValueInterfaceAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toNative(holder);
@@ skipping 48 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::testInterfaceGarbageCollectedAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceGarbageCollectedOrNullAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toNative(holder);
-    RawPtr<TestInterfaceGarbageCollected> cppValue(impl->testInterfaceGarbageCollectedOrNullAttribute());
-    if (!cppValue) {
-        v8SetReturnValueNull(info);
-        return;
-    }
-    v8SetReturnValueFast(info, WTF::getPtr(cppValue.release()), impl);
+    v8SetReturnValueFast(info, WTF::getPtr(impl->testInterfaceGarbageCollectedOrNullAttribute()), impl);
 }
 
 static void testInterfaceGarbageCollectedOrNullAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::testInterfaceGarbageCollectedOrNullAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceGarbageCollectedOrNullAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
@@ skipping 37 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::testInterfaceWillBeGarbageCollectedAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toNative(holder);
-    RefPtrWillBeRawPtr<TestInterfaceWillBeGarbageCollected> cppValue(impl->testInterfaceWillBeGarbageCollectedOrNullAttribute());
-    if (!cppValue) {
-        v8SetReturnValueNull(info);
-        return;
-    }
-    v8SetReturnValueFast(info, WTF::getPtr(cppValue.release()), impl);
+    v8SetReturnValueFast(info, WTF::getPtr(impl->testInterfaceWillBeGarbageCollectedOrNullAttribute()), impl);
 }
 
 static void testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeGetter(info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void testInterfaceWillBeGarbageCollectedOrNullAttributeAttributeSetter(v8::Local<v8::Value> v8Value, const v8::PropertyCallbackInfo<void>& info)
@@ skipping 4906 matching lines @@
     {"stringOrNullAttribute", TestObjectV8Internal::stringOrNullAttributeAttributeGetterCallback, TestObjectV8Internal::stringOrNullAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"longOrNullAttribute", TestObjectV8Internal::longOrNullAttributeAttributeGetterCallback, TestObjectV8Internal::longOrNullAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"testInterfaceOrNullAttribute", TestObjectV8Internal::testInterfaceOrNullAttributeAttributeGetterCallback, TestObjectV8Internal::testInterfaceOrNullAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"testEnumAttribute", TestObjectV8Internal::testEnumAttributeAttributeGetterCallback, TestObjectV8Internal::testEnumAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"eventHandlerAttribute", TestObjectV8Internal::eventHandlerAttributeAttributeGetterCallback, TestObjectV8Internal::eventHandlerAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"activityLoggingAccessForAllWorldsLongAttribute", TestObjectV8Internal::activityLoggingAccessForAllWorldsLongAttributeAttributeGetterCallback, TestObjectV8Internal::activityLoggingAccessForAllWorldsLongAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"activityLoggingGetterForAllWorldsLongAttribute", TestObjectV8Internal::activityLoggingGetterForAllWorldsLongAttributeAttributeGetterCallback, TestObjectV8Internal::activityLoggingGetterForAllWorldsLongAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"activityLoggingSetterForAllWorldsLongAttribute", TestObjectV8Internal::activityLoggingSetterForAllWorldsLongAttributeAttributeGetterCallback, TestObjectV8Internal::activityLoggingSetterForAllWorldsLongAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"cachedAttributeAnyAttribute", TestObjectV8Internal::cachedAttributeAnyAttributeAttributeGetterCallback, TestObjectV8Internal::cachedAttributeAnyAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"cachedArrayAttribute", TestObjectV8Internal::cachedArrayAttributeAttributeGetterCallback, TestObjectV8Internal::cachedArrayAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
+    {"cachedStringOrNoneAttribute", TestObjectV8Internal::cachedStringOrNoneAttributeAttributeGetterCallback, TestObjectV8Internal::cachedStringOrNoneAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"callWithExecutionContextAnyAttribute", TestObjectV8Internal::callWithExecutionContextAnyAttributeAttributeGetterCallback, TestObjectV8Internal::callWithExecutionContextAnyAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"callWithScriptStateAnyAttribute", TestObjectV8Internal::callWithScriptStateAnyAttributeAttributeGetterCallback, TestObjectV8Internal::callWithScriptStateAnyAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"callWithExecutionContextAndScriptStateAnyAttribute", TestObjectV8Internal::callWithExecutionContextAndScriptStateAnyAttributeAttributeGetterCallback, TestObjectV8Internal::callWithExecutionContextAndScriptStateAnyAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"checkSecurityForNodeReadonlyDocumentAttribute", TestObjectV8Internal::checkSecurityForNodeReadonlyDocumentAttributeAttributeGetterCallback, 0, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
 #if ENABLE(CONDITION)
     {"conditionalLongAttribute", TestObjectV8Internal::conditionalLongAttributeAttributeGetterCallback, TestObjectV8Internal::conditionalLongAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
 #endif // ENABLE(CONDITION)
 #if ENABLE(CONDITION_1) && ENABLE(CONDITION_2)
     {"conditionalAndLongAttribute", TestObjectV8Internal::conditionalAndLongAttributeAttributeGetterCallback, TestObjectV8Internal::conditionalAndLongAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
 #endif // ENABLE(CONDITION_1) && ENABLE(CONDITION_2)
@@ skipping 56 matching lines @@
     {"limitedWithInvalidMissingDefaultAttribute", TestObjectV8Internal::limitedWithInvalidMissingDefaultAttributeAttributeGetterCallback, TestObjectV8Internal::limitedWithInvalidMissingDefaultAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"corsSettingAttribute", TestObjectV8Internal::corsSettingAttributeAttributeGetterCallback, 0, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"limitedWithEmptyMissingInvalidAttribute", TestObjectV8Internal::limitedWithEmptyMissingInvalidAttributeAttributeGetterCallback, 0, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"replaceableReadonlyLongAttribute", TestObjectV8Internal::replaceableReadonlyLongAttributeAttributeGetterCallback, TestObjectV8Internal::TestObjectForceSetAttributeOnThisCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"locationReplaceable", TestObjectV8Internal::locationReplaceableAttributeGetterCallback, TestObjectV8Internal::locationReplaceableAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"setterCallWithActiveWindowAndFirstWindowStringAttribute", TestObjectV8Internal::setterCallWithActiveWindowAndFirstWindowStringAttributeAttributeGetterCallback, TestObjectV8Internal::setterCallWithActiveWindowAndFirstWindowStringAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"setterCallWithExecutionContextStringAttribute", TestObjectV8Internal::setterCallWithExecutionContextStringAttributeAttributeGetterCallback, TestObjectV8Internal::setterCallWithExecutionContextStringAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"treatNullAsNullStringStringAttribute", TestObjectV8Internal::treatNullAsNullStringStringAttributeAttributeGetterCallback, TestObjectV8Internal::treatNullAsNullStringStringAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"treatReturnedNullStringAsNullStringAttribute", TestObjectV8Internal::treatReturnedNullStringAsNullStringAttributeAttributeGetterCallback, TestObjectV8Internal::treatReturnedNullStringAsNullStringAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"treatReturnedNullStringAsUndefinedStringAttribute", TestObjectV8Internal::treatReturnedNullStringAsUndefinedStringAttributeAttributeGetterCallback, TestObjectV8Internal::treatReturnedNullStringAsUndefinedStringAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
+    {"cachedTreatReturnedNullStringAsUndefinedStringAttribute", TestObjectV8Internal::cachedTreatReturnedNullStringAsUndefinedStringAttributeAttributeGetterCallback, TestObjectV8Internal::cachedTreatReturnedNullStringAsUndefinedStringAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"treatReturnedNullStringAsNullByteStringAttribute", TestObjectV8Internal::treatReturnedNullStringAsNullByteStringAttributeAttributeGetterCallback, TestObjectV8Internal::treatReturnedNullStringAsNullByteStringAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"treatReturnedNullStringAsUndefinedByteStringAttribute", TestObjectV8Internal::treatReturnedNullStringAsUndefinedByteStringAttributeAttributeGetterCallback, TestObjectV8Internal::treatReturnedNullStringAsUndefinedByteStringAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"treatReturnedNullStringAsNullScalarValueStringAttribute", TestObjectV8Internal::treatReturnedNullStringAsNullScalarValueStringAttributeAttributeGetterCallback, TestObjectV8Internal::treatReturnedNullStringAsNullScalarValueStringAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"treatReturnedNullStringAsUndefinedScalarValueStringAttribute", TestObjectV8Internal::treatReturnedNullStringAsUndefinedScalarValueStringAttributeAttributeGetterCallback, TestObjectV8Internal::treatReturnedNullStringAsUndefinedScalarValueStringAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"typeCheckingInterfaceFloatAttribute", TestObjectV8Internal::typeCheckingInterfaceFloatAttributeAttributeGetterCallback, TestObjectV8Internal::typeCheckingInterfaceFloatAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"typeCheckingInterfaceTestInterfaceAttribute", TestObjectV8Internal::typeCheckingInterfaceTestInterfaceAttributeAttributeGetterCallback, TestObjectV8Internal::typeCheckingInterfaceTestInterfaceAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"typeCheckingInterfaceTestInterfaceOrNullAttribute", TestObjectV8Internal::typeCheckingInterfaceTestInterfaceOrNullAttributeAttributeGetterCallback, TestObjectV8Internal::typeCheckingInterfaceTestInterfaceOrNullAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"urlStringAttribute", TestObjectV8Internal::urlStringAttributeAttributeGetterCallback, TestObjectV8Internal::urlStringAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"urlStringAttribute", TestObjectV8Internal::urlStringAttributeAttributeGetterCallback, TestObjectV8Internal::urlStringAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::DEFAULT), static_cast<v8::PropertyAttribute>(v8::None), 0 /* on instance */},
     {"unforgeableLongAttribute", TestObjectV8Internal::unforgeableLongAttributeAttributeGetterCallback, TestObjectV8Internal::unforgeableLongAttributeAttributeSetterCallback, 0, 0, 0, static_cast<v8::AccessControl>(v8::PROHIBITS_OVERWRITING), static_cast<v8::PropertyAttribute>(v8::DontDelete), 0 /* on instance */},
@@ skipping 399 matching lines @@
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestObject* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore