Introduce an artificial 2 second delay after network IP address changes before re-running proxy auto-config.

During this time network requests will be stalled.

This is to work around a problem where DNS gives transient failures shortly after IP address changes.

BUG=50779
TEST=On a linux laptop switch between wireless networks while using auto-detect. When you switch to a network that contains the host 'wpad' verify that when InitProxyResolver runs it does not get a DNS error resolving 'wpad'. (Use about:net-internals to view this information).

Review URL: http://codereview.chromium.org/3151040

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@57471 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 13 insertions, 0 deletions

diff --git a/net/proxy/proxy_service.h b/net/proxy/proxy_service.h
index 8f30327..3b61fbb 100644
--- a/net/proxy/proxy_service.h
+++ b/net/proxy/proxy_service.h
@@ -193,6 +193,12 @@ class ProxyService : public base::RefCountedThreadSafe<ProxyService>,
   static ProxyConfigService* CreateSystemProxyConfigService(
       MessageLoop* io_loop, MessageLoop* file_loop);
 
+#if UNIT_TEST
+  void set_stall_proxy_auto_config_delay(base::TimeDelta delay) {
+    stall_proxy_auto_config_delay_ = delay;
+  }
+#endif
+
  private:
   friend class base::RefCountedThreadSafe<ProxyService>;
   FRIEND_TEST_ALL_PREFIXES(ProxyServiceTest, UpdateConfigAfterFailedAutodetect);
@@ -302,6 +308,13 @@ class ProxyService : public base::RefCountedThreadSafe<ProxyService>,
   // sent to.
   NetLog* net_log_;
 
+  // The earliest time at which we should run any proxy auto-config. (Used to
+  // stall re-configuration following an IP address change).
+  base::TimeTicks stall_proxy_autoconfig_until_;
+
+  // The amount of time to stall requests following IP address changes.
+  base::TimeDelta stall_proxy_auto_config_delay_;
+
   DISALLOW_COPY_AND_ASSIGN(ProxyService);
 };