Update charted to 0.4.8 and roll

packages/quiver/lib/src/time/clock.dart

 // Copyright 2013 Google Inc. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
 part of quiver.time;
 
 /// Returns current time.
 typedef DateTime TimeFunction();
 
 /// Return current system time.
 DateTime systemTime() => new DateTime.now();
 
 /// Days in a month. This array uses 1-based month numbers, i.e. January is
 /// the 1-st element in the array, not the 0-th.
-const _DAYS_IN_MONTH =
-    const [ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ];
+const _DAYS_IN_MONTH = const [
+  0,
+  31,
+  28,
+  31,
+  30,
+  31,
+  30,
+  31,
+  31,
+  30,
+  31,
+  30,
+  31
+];
 
-int _daysInMonth(int year, int month) => (month == DateTime.FEBRUARY &&
-    _isLeapYear(year)) ? 29 : _DAYS_IN_MONTH[month];
+int _daysInMonth(int year, int month) =>
+    (month == DateTime.FEBRUARY && _isLeapYear(year))
+        ? 29
+        : _DAYS_IN_MONTH[month];
 
 bool _isLeapYear(int year) =>
     (year % 4 == 0) && ((year % 100 != 0) || (year % 400 == 0));
 
 /// Takes a [date] that may be outside the allowed range of dates for a given
 /// [month] in a given [year] and returns the closest date that is within the
 /// allowed range.
 ///
 /// For example:
 ///
@@ skipping 36 matching lines @@
 
   /// Returns the point in time [Duration] amount of time ago.
   DateTime agoBy(Duration duration) => now().subtract(duration);
 
   /// Returns the point in time [Duration] amount of time from now.
   DateTime fromNowBy(Duration duration) => now().add(duration);
 
   /// Returns the point in time that's given amount of time ago. The
   /// amount of time is the sum of individual parts. Parts are compatible with
   /// ones defined in [Duration].
-  DateTime ago({int days: 0, int hours: 0, int minutes: 0, int seconds: 0,
-      int milliseconds: 0, int microseconds: 0}) => agoBy(new Duration(
+  DateTime ago(
+          {int days: 0,
+          int hours: 0,
+          int minutes: 0,
+          int seconds: 0,
+          int milliseconds: 0,
+          int microseconds: 0}) =>
+      agoBy(new Duration(
           days: days,
           hours: hours,
           minutes: minutes,
           seconds: seconds,
           milliseconds: milliseconds,
           microseconds: microseconds));
 
   /// Returns the point in time that's given amount of time from now. The
   /// amount of time is the sum of individual parts. Parts are compatible with
   /// ones defined in [Duration].
-  DateTime fromNow({int days: 0, int hours: 0, int minutes: 0, int seconds: 0,
-      int milliseconds: 0, int microseconds: 0}) => fromNowBy(new Duration(
+  DateTime fromNow(
+          {int days: 0,
+          int hours: 0,
+          int minutes: 0,
+          int seconds: 0,
+          int milliseconds: 0,
+          int microseconds: 0}) =>
+      fromNowBy(new Duration(
           days: days,
           hours: hours,
           minutes: minutes,
           seconds: seconds,
           milliseconds: milliseconds,
           microseconds: microseconds));
 
   /// Return the point in time [micros] microseconds ago.
   DateTime microsAgo(int micros) => ago(microseconds: micros);
 
@@ skipping 61 matching lines @@
     var time = now();
     var y = time.year - years;
     var d = _clampDate(time.day, y, time.month);
     return new DateTime(y, time.month, d, time.hour, time.minute, time.second,
         time.millisecond);
   }
 
   /// Return the point in time [years] from now on the same date.
   DateTime yearsFromNow(int years) => yearsAgo(-years);
 }