stale-while-revalidate experimental implementation.
Simplistic implementation of stale-while-revalidate. See design doc at
https://docs.google.com/document/d/1DMCIMAKjyKeYiu69jlI5OsO2pGyAMb81XflYK4hxsNM/edit?usp=sharing
This implementation has known flaws:
1. Set-Cookie, Strict-Transport-Security and Public-Key-Pins headers
are lost from the responses of asynchronous revalidations.
2. Conditional requests sent from the Blink cache do not have the
stale-while-revalidate logic applied to them.
3. Support for the bandwidth reduction proxy is hacky.
It will be replaced with a better implementation if/when the concept is proven.
BUG=348877
TEST=net_unittests
Review URL: https://codereview.chromium.org/455623003
Cr-Commit-Position: refs/heads/master@{#298649}
diff --git a/net/http/http_network_session.cc b/net/http/http_network_session.cc
index 1571ecc..3e602aea 100644
--- a/net/http/http_network_session.cc
+++ b/net/http/http_network_session.cc
@@ -73,6 +73,7 @@
host_mapping_rules(NULL),
enable_ssl_connect_job_waiting(false),
ignore_certificate_errors(false),
+ use_stale_while_revalidate(false),
testing_fixed_http_port(0),
testing_fixed_https_port(0),
enable_tcp_fast_open_for_ssl(false),
