Send PING to check the status of the SPDY connection.

net/base/run_all_unittests.cc

Index: net/base/run_all_unittests.cc
===================================================================
--- net/base/run_all_unittests.cc	(revision 105385)
+++ net/base/run_all_unittests.cc	(working copy)
@@ -7,14 +7,17 @@
 #include "crypto/nss_util.h"
 #include "net/base/net_test_suite.h"
 #include "net/socket/client_socket_pool_base.h"
+#include "net/spdy/spdy_session.h"
 
 using net::internal::ClientSocketPoolBaseHelper;
+using net::SpdySession;
 
 int main(int argc, char** argv) {
   // Record histograms, so we can get histograms data in tests.
   base::StatisticsRecorder recorder;
   NetTestSuite test_suite(argc, argv);
   ClientSocketPoolBaseHelper::set_connect_backup_jobs_enabled(false);
+  SpdySession::set_enable_ping_based_connection_checking(false);
 
 #if defined(OS_WIN)
   // We want to be sure to init NSPR on the main thread.