[catapult] - Copy Telemetry's gsutilz over to third_party.

third_party/gsutil/third_party/protorpc/experimental/javascript/closure/debug/error.js

Index: third_party/gsutil/third_party/protorpc/experimental/javascript/closure/debug/error.js
diff --git a/third_party/gsutil/third_party/protorpc/experimental/javascript/closure/debug/error.js b/third_party/gsutil/third_party/protorpc/experimental/javascript/closure/debug/error.js
new file mode 100644
index 0000000000000000000000000000000000000000..4ed20f70e333cc455e8f8f943feed393a505a54b
--- /dev/null
+++ b/third_party/gsutil/third_party/protorpc/experimental/javascript/closure/debug/error.js
@@ -0,0 +1,47 @@
+// Copyright 2009 The Closure Library Authors. All Rights Reserved.
+//
+// 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.
+
+/**
+ * @fileoverview Provides a base class for custom Error objects such that the
+ * stack is correctly maintained.
+ *
+ * You should never need to throw goog.debug.Error(msg) directly, Error(msg) is
+ * sufficient.
+ *
+ */
+
+goog.provide('goog.debug.Error');
+
+
+
+/**
+ * Base class for custom error objects.
+ * @param {*=} opt_msg The message associated with the error.
+ * @constructor
+ * @extends {Error}
+ */
+goog.debug.Error = function(opt_msg) {
+
+  // Ensure there is a stack trace.
+  this.stack = new Error().stack || '';
+
+  if (opt_msg) {
+    this.message = String(opt_msg);
+  }
+};
+goog.inherits(goog.debug.Error, Error);
+
+
+/** @inheritDoc */
+goog.debug.Error.prototype.name = 'CustomError';