Implement OscillatorNode.type= for Dartium.

Source/bindings/dart/custom/DartOscillatorNodeCustom.cpp

Index: Source/bindings/dart/custom/DartOscillatorNodeCustom.cpp
diff --git a/Source/bindings/dart/custom/DartOscillatorNodeCustom.cpp b/Source/bindings/dart/custom/DartOscillatorNodeCustom.cpp
index 5a9f5004db3bb89481fccb72a5893a99aa26bc11..81a92846cbaeef599fa6ae32853a3052f8368be3 100644
--- a/Source/bindings/dart/custom/DartOscillatorNodeCustom.cpp
+++ b/Source/bindings/dart/custom/DartOscillatorNodeCustom.cpp
@@ -37,10 +37,27 @@ namespace WebCore {
 
 namespace DartOscillatorNodeInternal {
 
-void typeSetter(Dart_NativeArguments)
+void typeSetter(Dart_NativeArguments args)
 {
-    // FIXME: proper implementation.
-    DART_UNIMPLEMENTED();
+    Dart_Handle exception = 0;
+    {
+        OscillatorNode* receiver = DartDOMWrapper::receiver<OscillatorNode>(args);
+
+        String type = DartUtilities::dartToString(args, 1, exception);
+        if (exception)
+            goto fail;
+
+        if (type == "sine" || type == "square" || type == "sawtooth" || type == "triangle") {
+            receiver->setType(type);
+            return;
+        }
+
+        exception = Dart_NewStringFromCString("Illegal OscillatorNode type");
+    }
+
+fail:
+    Dart_ThrowException(exception);
+    ASSERT_NOT_REACHED();
 }
 
 }