chromium-cpp: Set status code on errors, so that the console can track them.

styleguide/c++/chromium-cpp/main.py

Index: styleguide/c++/chromium-cpp/main.py
diff --git a/styleguide/c++/chromium-cpp/main.py b/styleguide/c++/chromium-cpp/main.py
index 9017296e5a22871a488c264419329e2ca5edd805..aef55ab4daaec9825b9429d1ccd11489d0984ace 100755
--- a/styleguide/c++/chromium-cpp/main.py
+++ b/styleguide/c++/chromium-cpp/main.py
@@ -33,6 +33,7 @@ class GitilesMirrorHandler(webapp2.RequestHandler):
         if not contents or self.request.get('bust'):
             result = urlfetch.fetch(url)
             if result.status_code != 200:
+                self.response.set_status(result.status_code)
                 self.response.write('http error %d' % result.status_code)
                 return
             contents = base64.b64decode(result.content)