[net/dns] Serve requests from HOSTS file if possible.

If the DnsConfig is available, we can serve the requests synchronously in Resolve. However, we might not receive the DnsConfig until the Job is placed in the queue. In that case, we attempt to serve the jobs once DnsConfig is available.

BUG=114826
TEST=./net_unittests --gtest_filter=HostResolverImplTest.ServeFromHosts

Original review: https://chromiumcodereview.appspot.com/9667025/


Review URL: http://codereview.chromium.org/9705017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@126697 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 4 insertions, 4 deletions

diff --git a/net/base/host_resolver.h b/net/base/host_resolver.h
index e375961..a282701 100644
--- a/net/base/host_resolver.h
+++ b/net/base/host_resolver.h
@@ -132,10 +132,10 @@ class NET_EXPORT HostResolver {
                       RequestHandle* out_req,
                       const BoundNetLog& net_log) = 0;
 
-  // Resolves the given hostname (or IP address literal) out of cache
-  // only.  This is guaranteed to complete synchronously.  This acts like
-  // |Resolve()| if the hostname is IP literal or cached value exists.
-  // Otherwise, ERR_DNS_CACHE_MISS is returned.
+  // Resolves the given hostname (or IP address literal) out of cache or HOSTS
+  // file (if enabled) only. This is guaranteed to complete synchronously.
+  // This acts like |Resolve()| if the hostname is IP literal, or cached value
+  // or HOSTS entry exists. Otherwise, ERR_DNS_CACHE_MISS is returned.
   virtual int ResolveFromCache(const RequestInfo& info,
                                AddressList* addresses,
                                const BoundNetLog& net_log) = 0;