Flush socket pools and SPDY session pool properly on explicit requests and network changes.

net/http/http_cache.cc

Index: net/http/http_cache.cc
diff --git a/net/http/http_cache.cc b/net/http/http_cache.cc
index 8b0811f02b4eaeaa3e01773c3bd0e055407d465a..8a445653f6553d94c464224ae71ef7e632f17b0e 100644
--- a/net/http/http_cache.cc
+++ b/net/http/http_cache.cc
@@ -377,12 +377,8 @@ void HttpCache::CloseCurrentConnections() {
   net::HttpNetworkLayer* network =
       static_cast<net::HttpNetworkLayer*>(network_layer_.get());
   HttpNetworkSession* session = network->GetSession();
-  if (session) {
-    session->tcp_socket_pool()->CloseIdleSockets();
-    if (session->spdy_session_pool())
-      session->spdy_session_pool()->CloseAllSessions();
-    session->ReplaceTCPSocketPool();
-  }
+  if (session)
+    session->Flush();
 }
 
 //-----------------------------------------------------------------------------