Generate all runtime files from dart.

tool/input_sdk/private/errors.dart

Index: tool/input_sdk/private/errors.dart
diff --git a/tool/input_sdk/private/errors.dart b/tool/input_sdk/private/errors.dart
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+// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+/// This library encapsulates the core sdk errors that the runtime knows about.
+
+library dart._errors;
+import 'dart:_foreign_helper' show JS, rest;
+import 'dart:_js_helper' show CastErrorImplementation;
+import 'dart:_operations' show throw_;
+
+throwNoSuchMethod(obj, name, pArgs, nArgs, extras) => JS('', '''(() => {
+  $throw_(new $NoSuchMethodError($obj, $name, $pArgs, $nArgs, $extras));
+})()''');
+
+throwCastError(actual, type) => JS('', '''(() => {
+  $throw_(new $CastErrorImplementation($actual, $type));
+})()''');
+
+throwAssertionError() => JS('', '''(() => {
+  $throw_(new $AssertionError());
+})()''');
+
+throwNullValueError() => JS('', '''(() => {
+  // TODO(vsm): Per spec, we should throw an NSM here.  Technically, we ought
+  // to thread through method info, but that uglifies the code and can't
+  // actually be queried ... it only affects how the error is printed.
+  $throw_(new $NoSuchMethodError(null,
+      new $Symbol('<Unexpected Null Value>'), null, null, null));
+})()''');