Treat ERR_CONNECTION_CLOSED as end-of-data marker for downloads.

net/url_request/url_request_http_job.cc

Index: net/url_request/url_request_http_job.cc
diff --git a/net/url_request/url_request_http_job.cc b/net/url_request/url_request_http_job.cc
index b7f8d4c6d39fc9b29394320f53efedfa7c6b46df..8d164cada44f6c354411b312de12ef09901b568c 100644
--- a/net/url_request/url_request_http_job.cc
+++ b/net/url_request/url_request_http_job.cc
@@ -283,7 +283,29 @@ void URLRequestHttpJob::NotifyHeadersComplete() {
   URLRequestJob::NotifyHeadersComplete();
 }
 
-void URLRequestHttpJob::NotifyDone(const URLRequestStatus& status) {
+void URLRequestHttpJob::NotifyDone(const URLRequestStatus& original_status) {
+  URLRequestStatus status(original_status);
+  // Some servers send the body compressed, but specify the content length as
+  // the uncompressed size.  Although this violates the HTTP spec we want to
+  // support it (as IE and FireFox do), but *only* for an exact match.
+  // See http://crbug.com/79694.
+  if (status.os_error() == net::ERR_CONNECTION_CLOSED) {
+    if (request_ && request_->response_headers()) {
+      int64 expected_length = request_->response_headers()->GetContentLength();
+      VLOG(21) << __FUNCTION__ << "() "
+               << "\"" << request_->url().spec() << "\""
+               << " content-length = " << expected_length
+               << " pre total = " << prefilter_bytes_read()
+               << " post total = " << postfilter_bytes_read();
+      if (0 == expected_length ||
+          postfilter_bytes_read() == expected_length ||
+          prefilter_bytes_read() == expected_length) {

[rvargas (doing something else), 2011/05/19 19:30:36]

if expected_length is 0 or prefilter_bytes_read we should not be clearing the
error, because those conditions should not be generating the error in the first
place (or at least not the one that we want to mask).

[ahendrickson, 2011/05/19 22:29:34]

Done.

+        // Clear the error.
+        status = URLRequestStatus();
+      }
+    }
+  }
+
   RecordCompressionHistograms();
   URLRequestJob::NotifyDone(status);
 }