Revert 110505 - Report ERR_CONTENT_LENGTH_MISMATCH when the count of bytes received doesn't match...

net/url_request/url_request_http_job.cc

Index: net/url_request/url_request_http_job.cc
===================================================================
--- net/url_request/url_request_http_job.cc	(revision 113513)
+++ net/url_request/url_request_http_job.cc	(working copy)
@@ -765,6 +765,9 @@
 void URLRequestHttpJob::OnReadCompleted(int result) {
   read_in_progress_ = false;
 
+  if (ShouldFixMismatchedContentLength(result))
+    result = 0;
+
   if (result == 0) {
     NotifyDone(URLRequestStatus());
   } else if (result < 0) {
@@ -1100,6 +1103,28 @@
           &URLRequestHttpJob::OnStartCompleted, rv));
 }
 
+bool URLRequestHttpJob::ShouldFixMismatchedContentLength(int rv) const {
+  // 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 (rv == 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.
+        return true;
+      }
+    }
+  }
+  return false;
+}
+
 bool URLRequestHttpJob::ReadRawData(IOBuffer* buf, int buf_size,
                                     int* bytes_read) {
   DCHECK_NE(buf_size, 0);
@@ -1108,6 +1133,9 @@
 
   int rv = transaction_->Read(buf, buf_size, &read_callback_);
 
+  if (ShouldFixMismatchedContentLength(rv))
+    rv = 0;
+
   if (rv >= 0) {
     *bytes_read = rv;
     if (!rv)