Cleanup dart to string conversions.

Source/WebCore/bindings/dart/custom/DartDOMWindowCustom.cpp

 // Copyright 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:
 //
 //    * 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
@@ skipping 80 matching lines @@
 }
 
 void locationSetter(Dart_NativeArguments args)
 {
     DartApiScope dartApiScope;
     Dart_Handle exception = 0;
     {
         DOMWindow* receiver = DartDOMWrapper::receiver<DOMWindow>(args);
         ASSERT(receiver == DartUtilities::domWindowForCurrentIsolate());
 
-        const ParameterAdapter<String> location(Dart_GetNativeArgument(args, 1));
-        if (!location.conversionSuccessful()) {
-            exception = location.exception();
+        DartStringAdapter location = DartUtilities::dartToString(Dart_GetNativeArgument(args, 1), exception);
+        if (exception)
             goto fail;
-        }
 
         receiver->setLocation(location, receiver, receiver);
         return;
     }
 
 fail:
     Dart_ThrowException(exception);
     ASSERT_NOT_REACHED();
 }
 
 void openCallback(Dart_NativeArguments args)
 {
     DartApiScope dartApiScope;
     Dart_Handle exception = 0;
     {
         DOMWindow* receiver = DartDOMWrapper::receiver<DOMWindow>(args);
         ASSERT(receiver == DartUtilities::domWindowForCurrentIsolate());
 
-        const ParameterAdapter<String> url(Dart_GetNativeArgument(args, 1));
-        if (!url.conversionSuccessful()) {
-            exception = url.exception();
+        DartStringAdapter url = DartUtilities::dartToString(Dart_GetNativeArgument(args, 1), exception);
+        if (exception)
             goto fail;
-        }
-        const ParameterAdapter<String> name(Dart_GetNativeArgument(args, 2));
-        if (!name.conversionSuccessful()) {
-            exception = name.exception();
+        DartStringAdapter name = DartUtilities::dartToString(Dart_GetNativeArgument(args, 2), exception);
+        if (exception)
             goto fail;
-        }
-        const ParameterAdapter<String> options(Dart_GetNativeArgument(args, 3), DartUtilities::ConvertNullToDefaultValue);
-        if (!options.conversionSuccessful()) {
-            exception = options.exception();
+        DartStringAdapter options = DartUtilities::dartToStringWithNullCheck(Dart_GetNativeArgument(args, 3), exception);
+        if (exception)
             goto fail;
-        }
 
         RefPtr<DOMWindow> openedWindow = receiver->open(url, name, options, receiver, receiver);
         if (openedWindow)
             DartDOMWrapper::returnValue<DartDOMWindow>(args, openedWindow.release());
         return;
     }
 
 fail:
     Dart_ThrowException(exception);
     ASSERT_NOT_REACHED();
@@ skipping 25 matching lines @@
         }
 
         RefPtr<SerializedScriptValue> message = DartUtilities::toSerializedScriptValue(
             Dart_GetNativeArgument(args, 1),
             &portArray,
             extendedTransfer ? &bufferArray : 0,
             exception);
         if (exception)
             goto fail;
 
-        const ParameterAdapter<String> targetOrigin(Dart_GetNativeArgument(args, 2));
-        if (!targetOrigin.conversionSuccessful()) {
-            exception = targetOrigin.exception();
+        DartStringAdapter targetOrigin = DartUtilities::dartToString(Dart_GetNativeArgument(args, 2), exception);
+        if (exception)
             goto fail;
-        }
 
         ExceptionCode ec = 0;
         receiver->postMessage(message.release(), &portArray, targetOrigin, source, ec);
         if (UNLIKELY(ec)) {
             exception = DartDOMWrapper::exceptionCodeToDartException(ec);
             goto fail;
         }
 
         return;
     }
@@ skipping 56 matching lines @@
 }
 
 void addEventListenerCallback(Dart_NativeArguments args)
 {
     DartApiScope dartApiScope;
     Dart_Handle exception = 0;
     {
         DOMWindow* receiver = DartDOMWrapper::receiver<DOMWindow>(args);
         ASSERT(receiver == DartUtilities::domWindowForCurrentIsolate());
 
-        const ParameterAdapter<String> type(Dart_GetNativeArgument(args, 1));
-        if (!type.conversionSuccessful()) {
-            exception = type.exception();
+        DartStringAdapter type = DartUtilities::dartToString(Dart_GetNativeArgument(args, 1), exception);
+        if (exception)
             goto fail;
-        }
         EventListener* listener = DartEventListener::toNative(Dart_GetNativeArgument(args, 2), exception);
         if (exception)
             goto fail;
         bool useCapture = DartUtilities::dartToBool(Dart_GetNativeArgument(args, 3), exception);
         if (exception)
             goto fail;
 
         receiver->addEventListener(type, listener, useCapture);
         return;
     }
 
 fail:
     Dart_ThrowException(exception);
     ASSERT_NOT_REACHED();
 }
 
 void removeEventListenerCallback(Dart_NativeArguments args)
 {
     DartApiScope dartApiScope;
     Dart_Handle exception = 0;
     {
         DOMWindow* receiver = DartDOMWrapper::receiver<DOMWindow>(args);
         ASSERT(receiver == DartUtilities::domWindowForCurrentIsolate());
 
-        const ParameterAdapter<String> type(Dart_GetNativeArgument(args, 1));
-        if (!type.conversionSuccessful()) {
-            exception = type.exception();
+        DartStringAdapter type = DartUtilities::dartToString(Dart_GetNativeArgument(args, 1), exception);
+        if (exception)
             goto fail;
-        }
         EventListener* listener = DartEventListener::toNative(Dart_GetNativeArgument(args, 2), exception);
         if (exception)
             goto fail;
         bool useCapture = DartUtilities::dartToBool(Dart_GetNativeArgument(args, 3), exception);
         if (exception)
             goto fail;
 
         receiver->removeEventListener(type, listener, useCapture);
         return;
     }
@@ skipping 10 matching lines @@
 }
 
 }
 
 Dart_Handle DartDOMWindow::toDart(DOMWindow* window)
 {
     return DartDOMWrapper::toDartWithClassName<DartDOMWindow>(window, "_DOMWindowCrossFrameImpl");
 }
 
 }