Add pause_after_load to the config file.

lib/src/runner/configuration/load.dart

 // Copyright (c) 2016, 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.
 
 import 'dart:io';
 
 import 'package:boolean_selector/boolean_selector.dart';
 import 'package:glob/glob.dart';
 import 'package:path/path.dart' as p;
 import 'package:source_span/source_span.dart';
@@ skipping 110 matching lines @@
     var osConfig = onOS[currentOS];
     return osConfig == null ? config : config.merge(osConfig);
   }
 
   /// Loads runner configuration (but not test configuration).
   ///
   /// If [_runnerConfig] is `false`, this will error if there are any
   /// runner-level configuration fields.
   Configuration _loadRunnerConfig() {
     if (!_runnerConfig) {
+      _disallow("pause_after_load");
       _disallow("reporter");
       _disallow("pub_serve");
       _disallow("concurrency");
       _disallow("platforms");
       _disallow("paths");
       _disallow("filename");
       _disallow("add_presets");
       _disallow("include_tags");
       _disallow("exclude_tags");
       return Configuration.empty;
     }
 
+    var pauseAfterLoad = _getBool("pause_after_load");
+
     var reporter = _getString("reporter");
     if (reporter != null && !allReporters.contains(reporter)) {
       _error('Unknown reporter "$reporter".', "reporter");
     }
 
     var pubServePort = _getInt("pub_serve");
     var concurrency = _getInt("concurrency");
 
     var patterns = _getList("names", (nameNode) {
       _validate(nameNode, "Names must be strings.", (value) => value is String);
@@ skipping 23 matching lines @@
 
     var filename = _parseValue("filename", (value) => new Glob(value));
 
     var chosenPresets = _getList("add_presets",
         (presetNode) => _parseIdentifierLike(presetNode, "Preset name"));
 
     var includeTags = _parseBooleanSelector("include_tags");
     var excludeTags = _parseBooleanSelector("exclude_tags");
 
     return new Configuration(
+        pauseAfterLoad: pauseAfterLoad,
         reporter: reporter,
         pubServePort: pubServePort,
         concurrency: concurrency,
         patterns: patterns,
         platforms: platforms,
         paths: paths,
         filename: filename,
         chosenPresets: chosenPresets,
         includeTags: includeTags,
         excludeTags: excludeTags);
@@ skipping 139 matching lines @@
     if (!_document.containsKey(field)) return;
     _error("$field isn't supported here.", field);
   }
 
   /// Throws a [SourceSpanFormatException] with [message] about [field].
   void _error(String message, String field) {
     throw new SourceSpanFormatException(
         message, _document.nodes[field].span, _source);
   }
 }