//net changes for stale-while-revalidate

net/http/http_cache_transaction.cc

Index: net/http/http_cache_transaction.cc
diff --git a/net/http/http_cache_transaction.cc b/net/http/http_cache_transaction.cc
index d5cb94d7909b233e49bbad53cf70e3806372dccc..64dacb86052fcc35384ada5955248503a711bfd1 100644
--- a/net/http/http_cache_transaction.cc
+++ b/net/http/http_cache_transaction.cc
@@ -2115,6 +2115,13 @@ int HttpCache::Transaction::BeginCacheValidation() {
 
   bool skip_validation = (required_validation == VALIDATION_NONE);
 
+  if ((effective_load_flags_ & LOAD_SUPPORT_ASYNC_REVALIDATION) &&
+      required_validation == VALIDATION_ASYNCHRONOUS) {
+    DCHECK_EQ("GET", request_->method);

[rvargas (doing something else), 2015/08/20 22:26:29]

nit: dchecks should read as an if, not as an EXPECT (aka, invert the order)

[Adam Rice, 2015/08/21 15:01:46]

I didn't realise that, thank you.

+    skip_validation = true;
+    response_.async_revalidation_required = true;
+  }
+
   if (request_->method == "HEAD" &&
       (truncated_ || response_.headers->response_code() == 206)) {
     DCHECK(!partial_);
@@ -2242,7 +2249,7 @@ int HttpCache::Transaction::BeginExternallyConditionalizedRequest() {
       EXTERNALLY_CONDITIONALIZED_CACHE_USABLE;
   if (mode_ == NONE)
     type = EXTERNALLY_CONDITIONALIZED_MISMATCHED_VALIDATORS;
-  else if (RequiresValidation())
+  else if (RequiresValidation() != VALIDATION_NONE)
     type = EXTERNALLY_CONDITIONALIZED_CACHE_REQUIRES_VALIDATION;
 
   // TODO(ricea): Add CACHE_USABLE_STALE once stale-while-revalidate CL landed.