Remove stale-while-revalidate experimental implementation.

net/http/http_cache_transaction.h

Index: net/http/http_cache_transaction.h
diff --git a/net/http/http_cache_transaction.h b/net/http/http_cache_transaction.h
index cbf092907a99869813309f9590b7bfae8c6a2cbc..3daf8e570cee5fc6115e55d02811947bc98fa601 100644
--- a/net/http/http_cache_transaction.h
+++ b/net/http/http_cache_transaction.h
@@ -10,6 +10,7 @@
 
 #include <string>
 
+#include "base/memory/scoped_ptr.h"

[gavinp, 2015/06/16 23:54:46]

Why is this being added, and not, say, "base/memory/ref_counted.h" or <stdint.h>
which appear also required by our coding standard?

[Adam Rice, 2015/06/17 10:18:00]

When performing the original revert merge, I accidentally removed some
include-what-you-use fixes from http_cache.cc, which I then added back when I
noticed them. At the same time, I added this include. I can only assume that it
seemed like a good idea at the time.

I've moved it to a separate CL, along with what turned out to be a surprising
number of other include-what-you-use cleanups:
https://codereview.chromium.org/1178013004/

You may lgtm it or not at your leisure.

 #include "base/time/time.h"
 #include "net/base/completion_callback.h"
 #include "net/base/request_priority.h"
@@ -340,9 +341,6 @@ class HttpCache::Transaction : public HttpTransaction {
   // Fixes the response headers to match expectations for a HEAD request.
   void FixHeadersForHead();
 
-  // Launches an asynchronous revalidation based on this transaction.
-  void TriggerAsyncValidation();
-
   // Changes the response code of a range request to be 416 (Requested range not
   // satisfiable).
   void FailRangeRequest();