Code coverage in Observatory

runtime/bin/vmservice/client/lib/src/observatory/isolate.dart

Index: runtime/bin/vmservice/client/lib/src/observatory/isolate.dart
diff --git a/runtime/bin/vmservice/client/lib/src/observatory/isolate.dart b/runtime/bin/vmservice/client/lib/src/observatory/isolate.dart
index 2117d8319cf75dbb8b2fba4a073aa233bb716832..babca7d8408357746ba2d8bc3465c55bcea38bb3 100644
--- a/runtime/bin/vmservice/client/lib/src/observatory/isolate.dart
+++ b/runtime/bin/vmservice/client/lib/src/observatory/isolate.dart
@@ -7,11 +7,11 @@ part of observatory;
 /// State for a running isolate.
 class Isolate extends Observable {
   @observable Profile profile;
+  @observable final Map<String, Script> scripts =
+      toObservable(new Map<String, Script>());
   @observable final List<Code> codes = new List<Code>();
   @observable String id;
   @observable String name;
-  @observable final Map<String, ScriptSource> scripts =
-      toObservable(new Map<String, ScriptSource>());
 
   Isolate(this.id, this.name);
 
@@ -39,4 +39,17 @@ class Isolate extends Observable {
       codes[i].resetTicks();
     }
   }
+
+  void updateCoverage(List coverages) {
+    for (var coverage in coverages) {
+      var id = coverage['script']['id'];
+      var script = scripts[id];
+      if (script == null) {
+        script = new Script.fromMap(coverage['script']);
+        scripts[id] = script;
+      }
+      assert(script != null);
+      script._processCoverageHits(coverage['hits']);
+    }
+  }
 }