Roll Observatory packages and add a roll script

packages/charted/test.disabled/core/namespace_test.dart

Index: packages/charted/test.disabled/core/namespace_test.dart
diff --git a/packages/charted/test.disabled/core/namespace_test.dart b/packages/charted/test.disabled/core/namespace_test.dart
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+++ b/packages/charted/test.disabled/core/namespace_test.dart
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+/*
+ * Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file or at
+ * https://developers.google.com/open-source/licenses/bsd
+ */
+
+part of charted.test.core;
+
+testNamespace() {
+  test('Namespace should parse known namespace prefixes', () {
+    List namespaces = [
+        {'prefix':'svg', 'tag':'g', 'uri':'http://www.w3.org/2000/svg' },
+        {'prefix':'xhtml', 'tag':'div', 'uri':'http://www.w3.org/1999/xhtml'}
+    ];
+    List namespacesWithoutTag = [
+        {'prefix':'xlink', 'uri':'http://www.w3.org/1999/xlink' },
+        {'prefix':'xml', 'uri':'http://www.w3.org/XML/1998/namespace'},
+        {'prefix':'xmlns', 'uri':'http://www.w3.org/2000/xmlns/'}
+    ];
+
+    namespaces.forEach((var item) {
+      var prefixedTag = '${item['prefix']}:${item['tag']}',
+          ns = new Namespace(prefixedTag);
+      expect(ns.namespaceUri, equals(item['uri']));
+      expect(ns.localName, equals(item['tag']));
+    });
+
+    namespacesWithoutTag.forEach((var item) {
+      var prefixedTag = '${item['prefix']}',
+          ns = new Namespace(prefixedTag);
+      expect(ns.namespaceUri, equals(item['uri']));
+    });
+  });
+
+  test('When namespace is not specified, only localName is set', () {
+    var ns = new Namespace('div');
+    expect(ns.namespaceUri, isNull);
+    expect(ns.localName, equals('div'));
+  });
+
+  group('Namespace::createChildElement()', () {
+    test('should create elements with '
+        'parent\'s namespace when mentioned tag does not have prefix', () {
+      Element parent = new Element.tag('div'),
+          parent2 = document.createElementNS(
+              'http://www.w3.org/2000/svg', 'div'),
+          child = Namespace.createChildElement('div', parent),
+          child2 = Namespace.createChildElement('div', parent2);
+
+      expect(parent.namespaceUri, equals(child.namespaceUri));
+      expect(parent2.namespaceUri, equals(child2.namespaceUri));
+    });
+
+    test('should use the right namespace Uri '
+        'when tag is prefixed with common namespace prefixes', () {
+      Element parent = new Element.tag('div'),
+          child = Namespace.createChildElement('xhtml:div', parent),
+          child2 = Namespace.createChildElement('svg:div', parent);
+      expect(child.namespaceUri, equals('http://www.w3.org/1999/xhtml'));
+      expect(child2.namespaceUri, equals('http://www.w3.org/2000/svg'));
+    });
+  });
+}