Roll Observatory packages and add a roll script

packages/web_components/.status

Index: packages/web_components/.status
diff --git a/packages/web_components/.status b/packages/web_components/.status
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+# Copyright (c) 2014, 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.
+
+# Don't run any test-like files that show up in packages directories. It
+# shouldn't be necessary to run "pub install" in these packages, but if you do
+# it shouldn't break the tests.
+*/packages/*/*: SkipByDesign
+*/*/packages/*/*: SkipByDesign
+*/*/*/packages/*/*: SkipByDesign
+*/*/*/*/packages/*/*: SkipByDesign
+*/*/*/*/*/packages/*/*: SkipByDesign
+
+# We need a hook in package-bots to invoke pub-build in nested folders before we
+# can run these tests:
+e2e_test/*: Skip
+build/e2e_test/*: Skip
+
+# Invalid once built, tests pre-build behavior.
+build/test/html_import_annotation_test: SkipByDesign
+
+[ $compiler == none && ($runtime == dartium || $runtime == ContentShellOnAndroid) ]
+test/interop_test: Pass, RuntimeError # Issue 18931
+
+[ $compiler == dart2js && $csp && $runtime == drt ]
+build/test/interop_test: Fail # Issue 19329
+
+[ $runtime == vm || $runtime == d8 || $runtime == jsshell ]
+test/*: SkipByDesign # uses dart:html
+build/test/*: SkipByDesign # uses dart:html
+e2e_test/html_imports/test/*: SkipByDesign # uses dart:html
+build/e2e_test/html_imports/test/*: SkipByDesign # uses dart:html
+
+[ $compiler == dart2js ]
+test/*: SkipByDesign # use pub-build to run tests (they need the companion .html file)
+
+[ $browser ]
+test/build/*: SkipByDesign # vm only tests
+build/test/build/*: SkipByDesign # vm only tests