Use getSourceReport for coverage/callsites in Observatory.

runtime/observatory/lib/src/elements/class_view.dart

 // Copyright (c) 2013, 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.
 
 library class_view_element;
 
 import 'dart:async';
 import 'observatory_element.dart';
 import 'package:observatory/cpu_profile.dart';
 import 'package:observatory/elements.dart';
@@ skipping 70 matching lines @@
   Future refresh() {
     instances = null;
     retainedBytes = null;
     mostRetained = null;
     var loads = [];
     loads.add(cls.reload());
     cls.fields.forEach((field) => loads.add(field.reload()));
     return Future.wait(loads);
   }
 
-  Future refreshCoverage() {
-    return cls.refreshCoverage();
-  }
-
   onSampleBufferChange(CpuProfile sampleBuffer) {
     stackTraceTreeConfigElement.show = sampleBuffer.sampleCount > 0;
     cpuProfileTreeElement.show = sampleBuffer.sampleCount > 0;
     cpuProfileTreeElement.render();
   }
 
   onTreeConfigChange(String modeSelector, String directionSelector) {
     ProfileTreeDirection direction = ProfileTreeDirection.Exclusive;
     if (directionSelector != 'Up') {
       direction = ProfileTreeDirection.Inclusive;
@@ skipping 11 matching lines @@
     return sampleBufferControlElement.reload(cls.isolate);
   }
 
   Future toggleAllocationTrace() {
     if (cls == null) {
       return new Future(refresh);
     }
     return cls.setTraceAllocations(!cls.traceAllocations).whenComplete(refresh);
   }
 }