Split debugger_location_test into two separate tests

runtime/observatory/tests/service/test_helper.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test_helper;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 import 'package:observatory/service_io.dart';
@@ skipping 208 matching lines @@
         if (pause_on_start || line == '') {
           // Received blank line.
           blank = true;
         }
         if (portNumber != null && blank == true && first == true) {
           completer.complete(portNumber);
           // Stop repeat completions.
           first = false;
           print('** Signaled to run test queries on $portNumber');
         }
-        print(line);
+        print('>testee>out> $line');
       });
       process.stderr.transform(UTF8.decoder)
                     .transform(new LineSplitter()).listen((line) {
-        print(line);
+        print('>testee>err> $line');
       });
       process.exitCode.then((exitCode) {
         if ((exitCode != 0) && !killedByTester) {
           throw "Testee exited with $exitCode";
         }
         print("** Process exited");
       });
       return completer.future;
     });
   }
@@ skipping 225 matching lines @@
         mainArgs: mainArgs,
         vmTests: tests,
         pause_on_start: pause_on_start,
         pause_on_exit: pause_on_exit,
         trace_service: trace_service,
         trace_compiler: trace_compiler,
         verbose_vm: verbose_vm,
         pause_on_unhandled_exceptions: pause_on_unhandled_exceptions);
   }
 }