Build script views programmatically.

runtime/observatory/lib/src/service/object.dart

Index: runtime/observatory/lib/src/service/object.dart
diff --git a/runtime/observatory/lib/src/service/object.dart b/runtime/observatory/lib/src/service/object.dart
index c6b1808af895929f1bcdf395cdad248a2a63492f..1beefe1382bb8910d0472ed980098ac3bddfd925 100644
--- a/runtime/observatory/lib/src/service/object.dart
+++ b/runtime/observatory/lib/src/service/object.dart
@@ -308,6 +308,7 @@ abstract class Coverage {
           var coverageList = coverage['coverage'];
           assert(coverageList != null);
           processCoverageData(coverageList);
+          return this;
         });
   }
 }
@@ -2107,6 +2108,7 @@ class Script extends ServiceObject with Coverage {
       _hits[line] = hit;
     }
     _applyHitsToLines();
+    notifyChange(null);
   }
 
   void _processSource(String source) {
@@ -2127,6 +2129,7 @@ class Script extends ServiceObject with Coverage {
       lines.add(new ScriptLine(this, i + 1, sourceLines[i]));
     }
     _applyHitsToLines();
+    notifyChange(null);
   }
 
   void _applyHitsToLines() {