Extract KotlinMetadataFinder interface out of KotlinClassFinder

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/KotlinMetadataFinder.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2010-2016 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.kotlin.serialization.deserialization
+
+import org.jetbrains.kotlin.name.FqName
+import java.io.InputStream
+
+interface KotlinMetadataFinder {
+    /**
+     * @return an [InputStream] which should be used to load the .kotlin_builtins file for package with the given [packageFqName].
+     */
+    fun findBuiltInsData(packageFqName: FqName): InputStream?
+}