Give structured information about imports and export in the service's library response.

runtime/observatory/tests/service/get_object_rpc_test.dart

Index: runtime/observatory/tests/service/get_object_rpc_test.dart
diff --git a/runtime/observatory/tests/service/get_object_rpc_test.dart b/runtime/observatory/tests/service/get_object_rpc_test.dart
index b7b511ee020ea1c1f65ea4ace24a5a9781b553e2..0599d1689166990821e68ef725335a3bccbd4795 100644
--- a/runtime/observatory/tests/service/get_object_rpc_test.dart
+++ b/runtime/observatory/tests/service/get_object_rpc_test.dart
@@ -125,8 +125,8 @@ var tests = [
     expect(result['name'], equals('get_object_rpc_test'));
     expect(result['uri'], startsWith('file:'));
     expect(result['uri'], endsWith('get_object_rpc_test.dart'));
-    expect(result['imports'].length, isPositive);
-    expect(result['imports'][0]['type'], equals('@Library'));
+    expect(result['dependencies'].length, isPositive);
+    expect(result['dependencies'][0]['target']['type'], equals('@Library'));
     expect(result['scripts'].length, isPositive);
     expect(result['scripts'][0]['type'], equals('@Script'));
     expect(result['variables'].length, isPositive);