Anti-DDoS enhancements: Log to net log, UMA stats, improved policy.

chrome/service/cloud_print/cloud_print_url_fetcher.cc

Index: chrome/service/cloud_print/cloud_print_url_fetcher.cc
diff --git a/chrome/service/cloud_print/cloud_print_url_fetcher.cc b/chrome/service/cloud_print/cloud_print_url_fetcher.cc
index 731acd35dff1ab79f38751e8ae3b8b193e25cfd7..13af5f7df19e0abd333df64c8f33216e2dc2efe5 100644
--- a/chrome/service/cloud_print/cloud_print_url_fetcher.cc
+++ b/chrome/service/cloud_print/cloud_print_url_fetcher.cc
@@ -102,12 +102,11 @@ void CloudPrintURLFetcher::OnURLFetchComplete(
   }
   // Retry the request if needed.
   if (action == RETRY_REQUEST) {
-    // If the response code is greater than or equal to 500, then the back-off
-    // period has been increased at the network level; otherwise, explicitly
-    // call ReceivedContentWasMalformed() to count the current request as a
-    // failure and increase the back-off period.
-    if (response_code < 500)
-      request_->ReceivedContentWasMalformed();
+    // Explicitly call ReceivedContentWasMalformed() to ensure the current
+    // request gets counted as a failure for calculation of the back-off
+    // period.  If it was already a failure by status code, this call will
+    // be ignored.
+    request_->ReceivedContentWasMalformed();
 
     ++num_retries_;
     if ((-1 != source->max_retries()) &&