Add a bunch of extra logging to Pub.

sdk/lib/_internal/pub/test/test_pub.dart

Index: sdk/lib/_internal/pub/test/test_pub.dart
diff --git a/sdk/lib/_internal/pub/test/test_pub.dart b/sdk/lib/_internal/pub/test/test_pub.dart
index 715b03a69da63c2a2a925ba860d640e087480463..6ac747b88d97fa2ddb36e475cfec60c3fb86c8e0 100644
--- a/sdk/lib/_internal/pub/test/test_pub.dart
+++ b/sdk/lib/_internal/pub/test/test_pub.dart
@@ -103,6 +103,7 @@ void serve([List<d.Descriptor> contents]) {
           var response = request.response;
           try {
             var path = request.uri.path.replaceFirst("/", "");
+            currentSchedule.addDebugInfo("[$path] got request");
 
             if (_requestedPaths == null) _requestedPaths = <String>[];
             _requestedPaths.add(path);
@@ -111,16 +112,20 @@ void serve([List<d.Descriptor> contents]) {
             var stream = baseDir.load(path);
 
             new ByteStream(stream).toBytes().then((data) {
+              currentSchedule.addDebugInfo("[$path] sending response:\n"
+                  "${new String.fromCharCodes(data)}");
               response.statusCode = 200;
               response.contentLength = data.length;
               response.add(data);
               response.close();
             }).catchError((e) {
+              currentSchedule.addDebugInfo("[$path] got load error: $e");
               response.statusCode = 404;
               response.contentLength = 0;
               response.close();
             });
           } catch (e) {
+            currentSchedule.addDebugInfo("[$path] got error: $e");
             currentSchedule.signalError(e);
             response.statusCode = 500;
             response.close();