Add some debug prints to figure out why a test is failing on windows.

pkg/watcher/test/utils.dart

Index: pkg/watcher/test/utils.dart
diff --git a/pkg/watcher/test/utils.dart b/pkg/watcher/test/utils.dart
index 5a22e609b3fb04b15088416a2ba7dcf337e1534c..d822e1fc237bdd666e8bf111299156b7b80a3f3f 100644
--- a/pkg/watcher/test/utils.dart
+++ b/pkg/watcher/test/utils.dart
@@ -48,6 +48,9 @@ void createSandbox() {
   var dir = new Directory("").createTempSync();
   _sandboxDir = dir.path;
 
+  // TODO(rnystrom): Temporary while debugging the Windows bot.
+  print("create mock modtime map for $_sandboxDir");
+
   _mockFileModificationTimes = new Map<String, int>();
   mockGetModificationTime((path) {
     path = p.relative(path, from: _sandboxDir);
@@ -55,12 +58,17 @@ void createSandbox() {
     // Make sure we got a path in the sandbox.
     assert(p.isRelative(path)  && !path.startsWith(".."));
 
+    // TODO(rnystrom): Temporary while debugging the Windows bot.
+    print("get mock modtime for $path = ${_mockFileModificationTimes[path]}");
     return new DateTime.fromMillisecondsSinceEpoch(
         _mockFileModificationTimes[path]);
   });
 
   // Delete the sandbox when done.
   currentSchedule.onComplete.schedule(() {
+    // TODO(rnystrom): Temporary while debugging the Windows bot.
+    print("delete mock modtime map for $_sandboxDir");
+
     if (_sandboxDir != null) {
       new Directory(_sandboxDir).deleteSync(recursive: true);
       _sandboxDir = null;
@@ -139,12 +147,17 @@ void writeFile(String path, {String contents, bool updateModified}) {
       dir.createSync(recursive: true);
     }
 
+    // TODO(rnystrom): Temporary while debugging the Windows bot.
+    print("write $path");
+
     new File(fullPath).writeAsStringSync(contents);
 
     // Manually update the mock modification time for the file.
     if (updateModified) {
       var milliseconds = _mockFileModificationTimes.putIfAbsent(path, () => 0);
       _mockFileModificationTimes[path]++;
+      // TODO(rnystrom): Temporary while debugging the Windows bot.
+      print("  update modtime to ${_mockFileModificationTimes[path]}");
     }
   });
 }
@@ -163,9 +176,14 @@ void renameFile(String from, String to) {
   schedule(() {
     new File(p.join(_sandboxDir, from)).renameSync(p.join(_sandboxDir, to));
 
+    // TODO(rnystrom): Temporary while debugging the Windows bot.
+    print("rename $from -> $to");
+
     // Manually update the mock modification time for the file.
     var milliseconds = _mockFileModificationTimes.putIfAbsent(to, () => 0);
     _mockFileModificationTimes[to]++;
+    // TODO(rnystrom): Temporary while debugging the Windows bot.
+    print("  update modtime to ${_mockFileModificationTimes[to]}");
   });
 }