Updated charted DEP to 0.4.X

packages/charted/lib/core/scales/linear_scale.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
 //
 part of charted.core.scales;
 
 class LinearScale implements Scale {
@@ skipping 27 matching lines @@
     if (nice) {
       _domain = ScaleUtils.nice(
           _domain, ScaleUtils.niceStep(_linearTickRange().step));
     }
 
     Function linear = math.min(_domain.length, _range.length) > 2
         ? ScaleUtils.polylinearScale
         : ScaleUtils.bilinearScale;
 
     Function uninterpolator = clamp ? uninterpolateClamp : uninterpolateNumber;
-    InterpolatorGenerator interpolator =
-        _rounded ? createRoundedNumberInterpolator : createNumberInterpolator;
+    InterpolatorGenerator interpolator;
+    if (rounded) {
+      interpolator = createRoundedNumberInterpolator;
+    } else {
+      interpolator = createNumberInterpolator;
+    }
 
     _invert = linear(_range, _domain, uninterpolator, createNumberInterpolator);
     _scale = linear(_domain, _range, uninterpolator, interpolator);
   }
 
   @override
   set range(Iterable value) {
     assert(value != null);
     _range = value;
     _reset();
@@ skipping 59 matching lines @@
     }
   }
 
   @override
   bool get nice => _nice;
 
   @override
   Extent get rangeExtent => ScaleUtils.extent(_range);
 
   @override
-  num scale(num value) => _scale(value);
+  scale(value) => _scale(value);
 
   @override
-  num invert(num value) => _invert(value);
+  invert(value) => _invert(value);
 
   Range _linearTickRange([Extent extent]) {
     if (extent == null) {
       extent = ScaleUtils.extent(_domain);
     }
     var span = extent.max - extent.min;
     if (span == 0) {
       span = 1.0; // [span / _ticksCount] should never be equal zero.
     }
     var step = math.pow(10, (math.log(span / _ticksCount) / math.LN10).floor());
@@ skipping 21 matching lines @@
     if (formatStr == null) {
       formatStr = ".${precision(tickRange.step)}f";
     }
     NumberFormat formatter = new NumberFormat(new EnUsLocale());
     return formatter.format(formatStr);
   }
 
   @override
   LinearScale clone() => new LinearScale._clone(this);
 }