Update third_party/protobuf to protobuf-v3.0.0-beta-3

third_party/protobuf/js/commonjs/export_testdeps.js

Index: third_party/protobuf/js/commonjs/export_testdeps.js
diff --git a/third_party/protobuf/js/commonjs/export_testdeps.js b/third_party/protobuf/js/commonjs/export_testdeps.js
new file mode 100644
index 0000000000000000000000000000000000000000..59c77ca2cd4f367e395a241247333dd63d8895b4
--- /dev/null
+++ b/third_party/protobuf/js/commonjs/export_testdeps.js
@@ -0,0 +1,18 @@
+/**
+ * @fileoverview Export symbols needed by tests in CommonJS style.
+ *
+ * This file is like export.js, but for symbols that are only used by tests.
+ * However we exclude assert functions here, because they are exported into
+ * the global namespace, so those are handled as a special case in
+ * export_asserts.js.
+ */
+
+goog.require('goog.crypt.base64');
+goog.require('jspb.arith.Int64');
+goog.require('jspb.arith.UInt64');
+goog.require('jspb.BinaryEncoder');
+goog.require('jspb.BinaryDecoder');
+goog.require('jspb.utils');
+
+exports.goog = goog;
+exports.jspb = jspb;