Handle vmservice messages while at breakpoint.

runtime/vm/vm_sources.gypi

 # 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.
 
 # This file contains all sources (vm and tests) for the dart virtual machine.
 # Unit test files need to have a '_test' suffix appended to the name.
 {
   'sources': [
     'allocation.cc',
     'allocation.h',
@@ skipping 94 matching lines @@
     'dart.h',
     'dart_api_impl.h',
     'dart_api_impl_test.cc',
     'dart_api_message.cc',
     'dart_api_message.h',
     'dart_api_state.h',
     'dart_entry.cc',
     'dart_entry.h',
     'dart_entry_test.cc',
     'debugger.cc',
+    'debugger_test.cc',
     'debugger.h',
     'debugger_api_impl_test.cc',
     'debugger_arm.cc',
     'debugger_ia32.cc',
     'debugger_mips.cc',
     'debugger_x64.cc',
     'debuginfo.h',
     'debuginfo_android.cc',
     'debuginfo_linux.cc',
     'deferred_objects.cc',
@@ skipping 175 matching lines @@
     'runtime_entry_x64.cc',
     'scanner.cc',
     'scanner.h',
     'scanner_test.cc',
     'scavenger.cc',
     'scavenger.h',
     'scopes.cc',
     'scopes.h',
     'scopes_test.cc',
     'service.cc',
+    'service_test.cc',
     'service.h',
     'signal_handler_android.cc',
     'signal_handler_linux.cc',
     'signal_handler_macos.cc',
     'signal_handler_win.cc',
     'signal_handler.h',
     'simulator.h',
     'simulator_arm.cc',
     'simulator_arm.h',
     'simulator_mips.cc',
@@ skipping 61 matching lines @@
     'visitor.h',
     'vtune.cc',
     'vtune.h',
     'weak_table.cc',
     'weak_table.h',
     'zone.cc',
     'zone.h',
     'zone_test.cc',
   ],
 }