Update traffic annotation tests on Windows FYI bot.

When network traffic annotation tests are run on Windows without
filtering for relevant files (to test heuristics), there might be
compile errors that can be ignored.

Bug: 844014
Change-Id: Ib1e843971ea8892430142ccb6a5f7ac71714e0ff
TBR: georgesak@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/1125069Reviewed-by: Ramin Halavati <rhalavati@chromium.org>
Commit-Queue: Ramin Halavati <rhalavati@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572491}

tools/traffic_annotation/scripts/traffic_annotation_auditor_tests.py

@@ -91,10 +91,13 @@ class TrafficAnnotationTestsChecker():
     _, stderr_text, return_code = self.tools.RunAuditor(
         args + ["--annotations-file=%s" % temp_filename])
 
-    # TODO(https://crbug.com/844014): Remove after debugging.
-    print("Return Code: %i" % return_code)
-    print("File Exists: %i" % os.path.exists(temp_filename))
     if os.path.exists(temp_filename):
+      # When tests are run on all files (without filtering), there might be some
+      # compile errors in irrelevant files on Windows that can be ignored.
+      if (return_code and "--no-filtering" in args and
+          sys.platform.startswith(('win', 'cygwin'))):
+        print("Ignoring return code: %i" % return_code)
+        return_code = 0
       annotations = None if return_code else open(temp_filename).read()
       os.remove(temp_filename)
     else: