Revert "Update the test runner to use the new dart:io API" again

tools/testing/dart/status_file_parser.dart

 // Copyright (c) 2012, 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 status_file_parser;
 
-import "dart:async";
 import "dart:io";
 import "status_expression.dart";
 
 /** Possible outcomes of running a test. */
 const CRASH = "crash";
 const TIMEOUT = "timeout";
 const FAIL = "fail";
 const PASS = "pass";
 /**
  * An indication to skip the test.  The caller is responsible for skipping it.
@@ skipping 41 matching lines @@
   }
 
   ReadConfigurationInto(statusFilePath, sections, sectionsRead);
 }
 
 void ReadConfigurationInto(path, sections, onDone) {
   File file = new File(path);
   if (!file.existsSync()) {
     throw new Exception('Cannot find test status file $path');
   }
-  Stream<String> lines =
-      file.openRead()
-          .transform(new StringDecoder())
-          .transform(new LineTransformer());
+  InputStream file_stream = file.openInputStream();
+  StringInputStream lines = new StringInputStream(file_stream);
 
   Section current = new Section.always();
   sections.add(current);
 
-  lines.listen((String line) {
-    Match match = StripComment.firstMatch(line);
-    line = (match == null) ? "" : match[0];
-    line = line.trim();
-    if (line.isEmpty) return;
+  lines.onLine = () {
+    String line;
+    while ((line = lines.readLine()) != null) {
+      Match match = StripComment.firstMatch(line);
+      line = (match == null) ? "" : match[0];
+      line = line.trim();
+      if (line.isEmpty) continue;
 
-    match = HeaderPattern.firstMatch(line);
-    if (match != null) {
-      String condition_string = match[1].trim();
-      List<String> tokens = new Tokenizer(condition_string).tokenize();
-      ExpressionParser parser = new ExpressionParser(new Scanner(tokens));
-      current = new Section(parser.parseBooleanExpression());
-      sections.add(current);
-      return;
+      match = HeaderPattern.firstMatch(line);
+      if (match != null) {
+        String condition_string = match[1].trim();
+        List<String> tokens = new Tokenizer(condition_string).tokenize();
+        ExpressionParser parser = new ExpressionParser(new Scanner(tokens));
+        current = new Section(parser.parseBooleanExpression());
+        sections.add(current);
+        continue;
+      }
+
+      match = RulePattern.firstMatch(line);
+      if (match != null) {
+        String name = match[1].trim();
+        // TODO(whesse): Handle test names ending in a wildcard (*).
+        String expression_string = match[2].trim();
+        List<String> tokens = new Tokenizer(expression_string).tokenize();
+        SetExpression expression =
+            new ExpressionParser(new Scanner(tokens)).parseSetExpression();
+        current.testRules.add(new TestRule(name, expression));
+        continue;
+      }
+
+      print("unmatched line: $line");
     }
+  };
 
-    match = RulePattern.firstMatch(line);
-    if (match != null) {
-      String name = match[1].trim();
-      // TODO(whesse): Handle test names ending in a wildcard (*).
-      String expression_string = match[2].trim();
-      List<String> tokens = new Tokenizer(expression_string).tokenize();
-      SetExpression expression =
-          new ExpressionParser(new Scanner(tokens)).parseSetExpression();
-      current.testRules.add(new TestRule(name, expression));
-      return;
-    }
-
-    print("unmatched line: $line");
-  },
-  onDone: onDone);
+  lines.onClosed = () {
+    onDone();
+  };
 }
 
 
 class TestRule {
   String name;
   SetExpression expression;
 
   TestRule(this.name, this.expression);
 
   String toString() => 'TestRule($name, $expression)';
@@ skipping 85 matching lines @@
         }
         regExps[i] = regExp;
       }
       _keyToRegExps[key] = regExps;
     });
 
     _regExpCache = null;
     _preprocessed = true;
   }
 }