Rename the get* methods in preparation for removing them.

runtime/observatory/test/metrics_test.dart

Index: runtime/observatory/test/metrics_test.dart
diff --git a/runtime/observatory/test/metrics_test.dart b/runtime/observatory/test/metrics_test.dart
index 8ea13a8d9ab428be360e46aeeab80158b18a864f..9a72e23a95fd6729e8db2497ae88e12523a242cf 100644
--- a/runtime/observatory/test/metrics_test.dart
+++ b/runtime/observatory/test/metrics_test.dart
@@ -17,7 +17,7 @@ void script() {
 var tests = [
 
 (Isolate isolate) =>
-  isolate.get('metrics').then((ServiceMap metrics) {
+  isolate.getDeprecated('metrics').then((ServiceMap metrics) {
     expect(metrics['type'], equals('MetricList'));
     var members = metrics['members'];
     expect(members, isList);
@@ -28,13 +28,13 @@ var tests = [
 }),
 
 (Isolate isolate) =>
-  isolate.get('metrics/a.b.c').then((ServiceMetric counter) {
+  isolate.getDeprecated('metrics/a.b.c').then((ServiceMetric counter) {
     expect(counter.name, equals('a.b.c'));
     expect(counter.value, equals(1234.5));
 }),
 
 (Isolate isolate) =>
-  isolate.get('metrics/a.b.d').then((DartError err) {
+  isolate.getDeprecated('metrics/a.b.d').then((DartError err) {
     expect(err is DartError, isTrue);
 }),