Plumbing for TCP FastOpen for SSL sockets.

chrome/browser/io_thread.cc

Index: chrome/browser/io_thread.cc
diff --git a/chrome/browser/io_thread.cc b/chrome/browser/io_thread.cc
index 595c01b03d5777bca0797ecce8051c57e56ba4fc..da88413522ee648be814e43454175de299d21cd5 100644
--- a/chrome/browser/io_thread.cc
+++ b/chrome/browser/io_thread.cc
@@ -843,8 +843,12 @@ void IOThread::InitializeNetworkOptions(const CommandLine& command_line) {
   // instance, constructed from a NetworkSession::Params, to allow us
   // to move this option to IOThread::Globals &
   // HttpNetworkSession::Params.
+  bool always_enable_if_supported = false;
   if (command_line.HasSwitch(switches::kEnableTcpFastOpen))
-    net::SetTCPFastOpenEnabled(true);
+    always_enable_if_supported = true;

[mmenke, 2014/09/09 14:29:28]

optional nit:  Could just merge these into one statement:

bool always_enable_if_supported =
    command_line.HasSwitch(switches::kEnableTcpFastOpen);

Could event get rid of the local, but I think the name makes it clearer.

[Jana, 2014/09/10 16:03:11]

I had just done exactly this nit fixing, so done :-)

+  // Checks for OS support of TCP FastOpen, and turns it on for all connections
+  // if indicated by user above.
+  net::CheckSupportAndMaybeEnableTCPFastOpen(always_enable_if_supported);
 }
 
 void IOThread::ConfigureSpdyFromTrial(const std::string& spdy_trial_group,