IDL: Simplify [TypeChecking=Interface] code generation

Source/bindings/tests/results/modules/V8TestInterfacePartial.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"
 #if ENABLE(CONDITION)
 #include "V8TestInterfacePartial.h"
 
@@ skipping 78 matching lines @@
     }
     exceptionState.throwTypeError("No function was found that matched the signature provided.");
     exceptionState.throwIfNeeded();
 }
 
 static void promiseMethodPartialOverload3Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestInterfaceImplementation* impl = V8TestInterface::toImpl(info.Holder());
     Document* document;
     {
-        if (info.Length() > 0 && !V8Document::hasInstance(info[0], info.GetIsolate())) {
+        document = V8Document::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        if (!document) {
             v8SetReturnValue(info, ScriptPromise::rejectRaw(info.GetIsolate(), V8ThrowException::createTypeError(info.GetIsolate(), ExceptionMessages::failedToExecute("promiseMethodPartialOverload", "TestInterface", "parameter 1 is not of type 'Document'."))));
             return;
         }
-        document = V8Document::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     v8SetReturnValue(info, TestPartialInterfaceImplementation3::promiseMethodPartialOverload(*impl, document).v8Value());
 }
 
 static void promiseMethodPartialOverloadMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "promiseMethodPartialOverload", "TestInterface", info.Holder(), info.GetIsolate());
     switch (std::min(1, info.Length())) {
     case 0:
         break;
@@ skipping 47 matching lines @@
         TOSTRING_VOID_INTERNAL(value, info[0]);
     }
     TestPartialInterfaceImplementation3::partial2VoidMethod(*impl, value);
 }
 
 static void partial2VoidMethod3Method(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestInterfaceImplementation* impl = V8TestInterface::toImpl(info.Holder());
     Node* node;
     {
-        if (info.Length() > 0 && !V8Node::hasInstance(info[0], info.GetIsolate())) {
+        node = V8Node::toImplWithTypeCheck(info.GetIsolate(), info[0]);
+        if (!node) {
             V8ThrowException::throwTypeError(info.GetIsolate(), ExceptionMessages::failedToExecute("partial2VoidMethod", "TestInterface", "parameter 1 is not of type 'Node'."));
             return;
         }
-        node = V8Node::toImpl(v8::Handle<v8::Object>::Cast(info[0]));
     }
     TestPartialInterfaceImplementation3::partial2VoidMethod(*impl, node);
 }
 
 static void partial2VoidMethodMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ExecutionContext, "partial2VoidMethod", "TestInterface", info.Holder(), info.GetIsolate());
     switch (std::min(1, info.Length())) {
     case 0:
         break;
@@ skipping 110 matching lines @@
     V8TestInterface::registerVoidMethodPartialOverloadMethodForPartialInterface(&TestInterfaceImplementationPartialV8Internal::voidMethodPartialOverloadMethod);
     V8TestInterface::registerStaticVoidMethodPartialOverloadMethodForPartialInterface(&TestInterfaceImplementationPartialV8Internal::staticVoidMethodPartialOverloadMethod);
     V8TestInterface::registerPromiseMethodPartialOverloadMethodForPartialInterface(&TestInterfaceImplementationPartialV8Internal::promiseMethodPartialOverloadMethod);
     V8TestInterface::registerStaticPromiseMethodPartialOverloadMethodForPartialInterface(&TestInterfaceImplementationPartialV8Internal::staticPromiseMethodPartialOverloadMethod);
     V8TestInterface::registerPartial2VoidMethodMethodForPartialInterface(&TestInterfaceImplementationPartialV8Internal::partial2VoidMethodMethod);
     V8TestInterface::registerPartial2StaticVoidMethodMethodForPartialInterface(&TestInterfaceImplementationPartialV8Internal::partial2StaticVoidMethodMethod);
 }
 
 } // namespace blink
 #endif // ENABLE(CONDITION)