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 d22cff78035be33dcce419f1e85aaa501b786744..1d0fbf5f3231f88183d9004d77b731e4627f192c 100644
--- a/net/url_request/url_request_http_job.cc
+++ b/net/url_request/url_request_http_job.cc
@@ -319,7 +319,28 @@ 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(1) << __FUNCTION__ << "() "
+              << "\"" << request_->url().spec() << "\""
+              << " content-length = " << expected_length
+              << " pre total = " << prefilter_bytes_read()
+              << " post total = " << postfilter_bytes_read();
+      if (postfilter_bytes_read() == expected_length) {
+        // Clear the error.
+        status.set_status(URLRequestStatus::SUCCESS);
+        status.set_os_error(0);
+      }
+    }
+  }
+
   RecordCompressionHistograms();
   URLRequestJob::NotifyDone(status);
 }