KJS: implement Throwable in Kotlin instead of use it as alias of JS Error

* Make it an inheritor of JS Error. Otherwise, Chakra engine doesn't fill stack trace of exception; In other engines inheritance has some good effects too.
* Copy all properties from internally created instance of JS Error

 #KT-6985 Fixed
 #KT-2328 Fixed
 #KT-8019 Fixed
 #KT-10911 Fixed

js/js.libraries/src/builtins/Throwable.kt

@@ -0,0 +1,47 @@
+/*
+ * 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 kotlin
+
+import kotlin.js.internal.JsError
+
+/**
+ * The base class for all errors and exceptions. Only instances of this class can be thrown or caught.
+ *
+ * @param message the detail message string.
+ * @param cause the cause of this throwable.
+ */
+public open class Throwable(open val message: String?, open val cause: Throwable?) : JsError(message) {
+    constructor(message: String?) : this(message, null)
+
+    constructor(cause: Throwable?) : this(cause?.toString(), cause)
+
+    constructor() : this(null, null)
+
+    init {
+        var e = JsError(message)
+        copyOwnProperties(e, this)
+        val t: dynamic = this
+        t.name = t.constructor.name
+    }
+}
+
+private fun copyOwnProperties(from: dynamic, to: dynamic) {
+    val names: Array<String> = js("Object").getOwnPropertyNames(from);
+    for (name in names) {
+        to[name] = from[name];
+    }
+}

js/js.libraries/src/builtins/declarations.kt

@@ -0,0 +1,21 @@
+/*
+ * 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 kotlin.js.internal
+
+@native
+@JsName("Error")
+public open class JsError(message: String?)

js/js.libraries/src/core/exceptions.kt

@@ -16,38 +16,28 @@
 
 package kotlin
 
-open class Error(message: String? = null) : Throwable(message, null) {
-    init {
-        val self: dynamic = this
-        self.message = message
-    }
-}
+open class Error(message: String? = null) : Throwable(message, null)
 
-open class Exception(message: String? = null) : Throwable(message, null) {
-    init {
-        val self: dynamic = this
-        self.message = message
-    }
-}
+open class Exception(message: String? = null) : Throwable(message, null)
 
-open class RuntimeException(message: String? = null) : Exception(message) {}
+open class RuntimeException(message: String? = null) : Exception(message)
 
-open class IllegalArgumentException(message: String? = null) : RuntimeException(message) {}
+open class IllegalArgumentException(message: String? = null) : RuntimeException(message)
 
-open class IllegalStateException(message: String? = null) : RuntimeException(message) {}
+open class IllegalStateException(message: String? = null) : RuntimeException(message)
 
-open class IndexOutOfBoundsException(message: String? = null) : RuntimeException(message) {}
+open class IndexOutOfBoundsException(message: String? = null) : RuntimeException(message)
 
-open class ConcurrentModificationException(message: String? = null) : RuntimeException(message) {}
+open class ConcurrentModificationException(message: String? = null) : RuntimeException(message)
 
-open class UnsupportedOperationException(message: String? = null) : RuntimeException(message) {}
+open class UnsupportedOperationException(message: String? = null) : RuntimeException(message)
 
-open class NumberFormatException(message: String? = null) : RuntimeException(message) {}
+open class NumberFormatException(message: String? = null) : RuntimeException(message)
 
-open class NullPointerException(message: String? = null) : RuntimeException(message) {}
+open class NullPointerException(message: String? = null) : RuntimeException(message)
 
-open class ClassCastException(message: String? = null) : RuntimeException(message) {}
+open class ClassCastException(message: String? = null) : RuntimeException(message)
 
-open class AssertionError(message: String? = null) : Error(message) {}
+open class AssertionError(message: String? = null) : Error(message)
 
-open class NoSuchElementException(message: String? = null) : Exception() {}
+open class NoSuchElementException(message: String? = null) : Exception()