Roll Observatory packages and add a roll script

web_components/lib/build/messages.dart

Index: web_components/lib/build/messages.dart
diff --git a/web_components/lib/build/messages.dart b/web_components/lib/build/messages.dart
deleted file mode 100644
index 87f3fa39e8b6ae2280803f23bcf711be869c0b71..0000000000000000000000000000000000000000
--- a/web_components/lib/build/messages.dart
+++ /dev/null
@@ -1,68 +0,0 @@
-// 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.
-
-/// Contains all error and warning messages produced by web_components.
-library web_components.build.messages;
-
-import 'package:code_transformers/messages/messages.dart';
-
-const scriptFileNotFound = const MessageTemplate(
-    const MessageId('web_components', 0), 'Script file at "%-url-%" not found.',
-    'URL to a script file might be incorrect', '''
-An error occurred trying to read a script tag on a given URL. This is often the
-result of a broken URL in a `<script src="...">`.
-''');
-
-const scriptIncludedMoreThanOnce = const MessageTemplate(
-    const MessageId('web_components', 1),
-    'The `%-url-%` script was included more than once.',
-    'Dart script file included more than once.', '''
-Duplicate dart scripts often happen if you have multiple html imports that
-include the same script. The simplest workaround for this is to move your dart
-script to its own html file, and import that instead of the script (html imports
-are automatically deduped).
-
-For example:
-
-    <script type="application/dart" src="foo.dart"></script>
-
-Should turn into:
-
-    <link rel="import" href="foo.html">
-
-And `foo.html` should look like:
-
-    <script type="application/dart" src="foo.dart"></script>
-''');
-
-const exactlyOneScriptPerEntryPoint = const MessageTemplate(
-    const MessageId('web_components', 2),
-    'Found either zero or multiple dart scripts in the entry point `%-url-%`. '
-    'Exactly one was expected.',
-    'Each entry point html file should contain exactly one dart script tag.',
-    'Each entry point html file should contain exactly one dart script tag.');
-
-const internalErrorDontKnowHowToImport = const MessageTemplate(
-    const MessageId('web_components', 3),
-    "internal error: don't know how to include %-target-% from"
-    " %-source-%.%-extra-%", "Internal error: don't know how to include a URL",
-    '''
-Sorry, you just ran into a bug in the web_components transformer code. Please
-file a bug at <https://github.com/dart-lang/web-components/issues/new>
-including, if possible, some example code that can help the team reproduce the
-issue.
-''');
-
-const inlineImportFail = const MessageTemplate(
-    const MessageId('web_components', 4),
-    'Failed to inline HTML import: %-error-%', 'Error while inlining an import',
-    '''
-An error occurred while inlining an import in the web_components build. This is
-often the result of a broken HTML import.
-
-One possible cause is using an @HtmlImport containing a relative path from
-within an inline script tag, see http://goo.gl/ZgrhaV. The workaround currently
-is to use a `package:` url instead, move the code to a dart file, or simply
-adding a real html import (since you are already in an html file).
-''');