Roll Observatory deps (charted -> ^0.3.0)

packages/charted/lib/core/utils.dart

 //
 // 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
 //
 
 /// A collection of utilities for use by rest of the library and it's users
 library charted.core.utils;
 
 import "dart:html" show Element, NodeTreeSanitizer;
 import "dart:math" as math;
 import "dart:async";
 
 import "package:intl/intl.dart" show BidiFormatter, Bidi, TextDirection;
 import "package:collection/collection.dart";
 import "package:quiver/core.dart";
 
 part 'utils/color.dart';
 part 'utils/disposer.dart';
 part 'utils/lists.dart';
 part 'utils/math.dart';
 part 'utils/namespace.dart';
 part 'utils/object_factory.dart';
 part 'utils/rect.dart';
 part 'utils/bidi_formatter.dart';
 
-const String ORIENTATION_LEFT   = 'left';
-const String ORIENTATION_RIGHT  = 'right';
-const String ORIENTATION_TOP    = 'top';
+const String ORIENTATION_LEFT = 'left';
+const String ORIENTATION_RIGHT = 'right';
+const String ORIENTATION_TOP = 'top';
 const String ORIENTATION_BOTTOM = 'bottom';
 
 /// Identity function that returns the value passed as it's parameter.
 identityFunction(x) => x;
 
 /// Function that formats a value to String.
 typedef String FormatFunction(value);
 
 /// Test if the given String or Iterable, [val] is null or empty
 bool isNullOrEmpty(val) {
   assert(val == null || val is String || val is Iterable);
   return val == null || val.isEmpty;
 }
 
 /// An empty tree sanitizer for use with Element.html
 /// This sanitizer must not be used when attaching user input to the DOM.
 class NullTreeSanitizer implements NodeTreeSanitizer {
   void sanitizeTree(_) {}
 }