Revert https://codereview.chromium.org/1291903002 (protobuf roll).

third_party/protobuf/src/google/protobuf/compiler/package_info.h

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
-// https://developers.google.com/protocol-buffers/
+// http://code.google.com/p/protobuf/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
@@ skipping 41 matching lines @@
 //   provides you with a complete compiler front-end, so all you need to do
 //   is write a custom implementation of CodeGenerator and a trivial main()
 //   function.  You can even make your compiler support the official languages
 //   in addition to your own.  Since this functionality is only useful to those
 //   writing custom compilers, it is in a separate library called "libprotoc"
 //   which you will have to link against.
 namespace compiler {}
 
 }  // namespace protobuf
 }  // namespace google