Misc Observatory patches:

runtime/observatory/tests/service/break_on_activation_test.dart

Index: runtime/observatory/tests/service/break_on_activation_test.dart
diff --git a/runtime/observatory/tests/service/break_on_activation_test.dart b/runtime/observatory/tests/service/break_on_activation_test.dart
index 128017fcf9ee6cba29dc51617365ca0216c12285..902958749ad53ee249f225c5c1947a643226cd35 100644
--- a/runtime/observatory/tests/service/break_on_activation_test.dart
+++ b/runtime/observatory/tests/service/break_on_activation_test.dart
@@ -6,7 +6,6 @@
 import 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';
 import 'test_helper.dart';
-import 'dart:async';
 
 genRepeater(value) {
   return () => print(value);
@@ -71,8 +70,6 @@ var tests = [
 
   }
   var r1Ref = await valueOfField('r1');
-  var r2Ref = await valueOfField('r2');
-  var r3Ref = await valueOfField('r3');
 
   var bpt1 = await isolate.addBreakOnActivation(r1Ref);
   print("Added breakpoint $bpt1");
@@ -113,8 +110,6 @@ var tests = [
     return field.staticValue;
   }
   var r1Ref = await valueOfField('r1_named');
-  var r2Ref = await valueOfField('r2_named');
-  var r3Ref = await valueOfField('r3_named');
 
   var bpt1 = await isolate.addBreakOnActivation(r1Ref);
   print("Added breakpoint $bpt1");
@@ -156,7 +151,6 @@ var tests = [
   }
   var r1Ref = await valueOfField('r1');
   var r2Ref = await valueOfField('r2');
-  var r3Ref = await valueOfField('r3');
 
   var bpt1 = await isolate.addBreakOnActivation(r1Ref);
   print("Added breakpoint $bpt1");