Start trying to track down why full_coverage_test is timing out all the time.

tests/standalone/full_coverage_test.dart

 // Copyright (c) 2014, 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.
 
 // These tests fork a second VM process that runs the script
 // ``tools/full-coverage.dart'' and verifies that the tool
 // produces the expeced output.
 
 import 'dart:async';
 import 'dart:convert';
@@ skipping 202 matching lines @@
 main() {
   String testingDirectory;
 
   setUp(() {
     testingDirectory = prepareEnv();
   });
 
   tearDown(() => destroyEnv(testingDirectory));
 
   test('CoverageTests', () {
+    print('Generating coverage data...');
     generateCoverage(testingDirectory);
+    print('Done Generating coverage data.');
 
+    print('Running tests...');
     coverageTests.forEach((cTest) {
       String programDir = path.join(testingDirectory, cTest['name']);
       String programPath = path.join(programDir, "${cTest['name']}.dart");
       testCoverage(programDir, programPath,
                    new LcovDescriptor(programPath),
                    new List.from(cTest['expectedHits']));
       testCoverage(programDir, programPath,
                    new PrettyPrintDescriptor(programPath),
                    new List.from(cTest['expectedHits']));
     });
   });
 }