JS frontend: suppress UNUSED_PARAM for native declarations.

#KT-2141 Fixed

js/js.frontend/src/org/jetbrains/k2js/PredefinedAnnotation.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.k2js
+
+public enum class PredefinedAnnotation(public val fqName: String) {
+    LIBRARY : PredefinedAnnotation("kotlin.js.library")
+    NATIVE : PredefinedAnnotation("kotlin.js.native")
+}

js/js.frontend/src/org/jetbrains/k2js/analyze/SuppressUnusedParameterForJsNative.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.k2js.analyze
+
+import org.jetbrains.jet.lang.descriptors.annotations.AnnotationDescriptor
+import org.jetbrains.jet.lang.resolve.DescriptorUtils
+import org.jetbrains.jet.lang.diagnostics.Errors
+import org.jetbrains.jet.lang.resolve.name.FqNameUnsafe
+import org.jetbrains.jet.lang.resolve.DiagnosticsWithSuppression
+import org.jetbrains.k2js.PredefinedAnnotation
+
+class SuppressUnusedParameterForJsNative : DiagnosticsWithSuppression.SuppressStringProvider {
+    override fun get(annotationDescriptor: AnnotationDescriptor): List<String> {
+        val descriptor = DescriptorUtils.getClassDescriptorForType(annotationDescriptor.getType())
+        if (PredefinedAnnotation.NATIVE.fqName == DescriptorUtils.getFqName(descriptor).asString()) {
+            return listOf(Errors.UNUSED_PARAMETER.getName().toLowerCase())
+        }
+
+        return listOf()
+    }
+}