Adds custom ttl argument to HostCache::Set.

net/base/host_cache.cc

Index: net/base/host_cache.cc
diff --git a/net/base/host_cache.cc b/net/base/host_cache.cc
index 03eb23a01c1c97e65a3da0916041073d082eec19..dbf3bba3814f9ff983282f2a80bffef64c5cbd08 100644
--- a/net/base/host_cache.cc
+++ b/net/base/host_cache.cc
@@ -53,13 +53,16 @@ const HostCache::Entry* HostCache::Lookup(const Key& key,
 HostCache::Entry* HostCache::Set(const Key& key,
                                  int error,
                                  const AddressList& addrlist,
+                                 base::TimeDelta ttl,
                                  base::TimeTicks now) {
   DCHECK(CalledOnValidThread());
   if (caching_is_disabled())
     return NULL;
 
-  base::TimeTicks expiration = now +
-      (error == OK ? success_entry_ttl_ : failure_entry_ttl_);
+  if (ttl == base::TimeDelta())
+    ttl = (error == OK ? success_entry_ttl_ : failure_entry_ttl_);
+
+  base::TimeTicks expiration = now + ttl;
 
   scoped_refptr<Entry>& entry = entries_[key];
   if (!entry) {
@@ -81,6 +84,13 @@ HostCache::Entry* HostCache::Set(const Key& key,
   }
 }
 
+HostCache::Entry* HostCache::Set(const Key& key,
+                                 int error,
+                                 const AddressList& addrlist,
+                                 base::TimeTicks now) {
+  return Set(key, error, addrlist, base::TimeDelta(), now);
+}
+
 void HostCache::clear() {
   DCHECK(CalledOnValidThread());
   entries_.clear();