IDL: Drop value conversion (V8 -> C++) macros from generated code

Source/bindings/tests/results/core/V8TestNode.cpp

Index: Source/bindings/tests/results/core/V8TestNode.cpp
diff --git a/Source/bindings/tests/results/core/V8TestNode.cpp b/Source/bindings/tests/results/core/V8TestNode.cpp
index 42368ebefe4cedaa9a8dd58546315cc5ffe39df0..14769866fc3ed43746b935ba1b445f958bc430cc 100644
--- a/Source/bindings/tests/results/core/V8TestNode.cpp
+++ b/Source/bindings/tests/results/core/V8TestNode.cpp
@@ -48,7 +48,7 @@ static void hrefAttributeSetter(v8::Local<v8::Value> v8Value, const v8::Property
 {
     v8::Local<v8::Object> holder = info.Holder();
     TestNode* impl = V8TestNode::toImpl(holder);
-    TOSTRING_VOID(V8StringResource<>, cppValue, v8Value);
+    TONATIVE_DECLARE(V8StringResource<>, cppValue, (cppValue = v8Value).prepare(), return);
     impl->setHref(cppValue);
 }
 
@@ -78,7 +78,7 @@ static void hrefThrowsAttributeSetter(v8::Local<v8::Value> v8Value, const v8::Pr
     v8::Local<v8::Object> holder = info.Holder();
     ExceptionState exceptionState(ExceptionState::SetterContext, "hrefThrows", "TestNode", holder, info.GetIsolate());
     TestNode* impl = V8TestNode::toImpl(holder);
-    TOSTRING_VOID(V8StringResource<>, cppValue, v8Value);
+    TONATIVE_DECLARE(V8StringResource<>, cppValue, (cppValue = v8Value).prepare(), return);
     impl->setHrefThrows(cppValue, exceptionState);
     exceptionState.throwIfNeeded();
 }
@@ -108,7 +108,7 @@ static void hrefCallWithAttributeSetter(v8::Local<v8::Value> v8Value, const v8::
 {
     v8::Local<v8::Object> holder = info.Holder();
     TestNode* impl = V8TestNode::toImpl(holder);
-    TOSTRING_VOID(V8StringResource<>, cppValue, v8Value);
+    TONATIVE_DECLARE(V8StringResource<>, cppValue, (cppValue = v8Value).prepare(), return);
     ExecutionContext* executionContext = currentExecutionContext(info.GetIsolate());
     impl->setHrefCallWith(executionContext, callingDOMWindow(info.GetIsolate()), enteredDOMWindow(info.GetIsolate()), cppValue);
 }
@@ -139,7 +139,7 @@ static void hrefByteStringAttributeSetter(v8::Local<v8::Value> v8Value, const v8
     v8::Local<v8::Object> holder = info.Holder();
     ExceptionState exceptionState(ExceptionState::SetterContext, "hrefByteString", "TestNode", holder, info.GetIsolate());
     TestNode* impl = V8TestNode::toImpl(holder);
-    TONATIVE_VOID_EXCEPTIONSTATE(V8StringResource<>, cppValue, toByteString(v8Value, exceptionState), exceptionState);
+    TONATIVE_DECLARE(V8StringResource<>, cppValue, convertAndThrow(cppValue = toByteString(v8Value, exceptionState), exceptionState), return);
     impl->setHrefByteString(cppValue);
 }