SPDY - Added enabling of SPDY/3 to about:flags.

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
===================================================================
--- chrome/browser/chrome_browser_main.cc	(revision 127896)
+++ chrome/browser/chrome_browser_main.cc	(working copy)
@@ -825,6 +825,35 @@
     if (value > 0)
       net::SpdySession::set_max_concurrent_streams(value);
   }
+
+  if (parsed_command_line().HasSwitch(switches::kEnableSpdy3)) {
+    net::HttpStreamFactory::EnableSPDY3();
+  } else if (parsed_command_line().HasSwitch(
+             switches::kEnableSpdyFlowControl)) {
+    net::HttpStreamFactory::EnableFlowControl();
+  } else {
+    const base::FieldTrial::Probability kSpdyDivisor = 100;
+    base::FieldTrial::Probability flow_control_probability = 5;
+    base::FieldTrial::Probability spdy3_probability = 5;
+
+    // After October 30, 2012 builds, it will always be in default group
+    // (disable_spdy_protocol_test).
+    scoped_refptr<base::FieldTrial> trial(
+        new base::FieldTrial(
+            "SpdyProtocolTest", kSpdyDivisor, "disable_spdy_protocol_test",
+            2012, 10, 30));

[Ryan Hamilton, 2012/03/22 16:30:21]

October seems like a long time from now, so this is probably fine.  That being
said, I would have thought we would wait to add this code until we we
comfortable that spdy/3 was working as expected.

[ramant (doing other things), 2012/03/22 16:38:24]

Just to be on safe side, set the probability to 0. In my tests, didn't access
any server which advertised spdy/3. Will change this after getting lot more
testing with Hasan with a spdy/3 server.

Done.

+
+    int spdy3_grp = trial->AppendGroup("spdy3", spdy3_probability);
+    int flow_control_grp = trial->AppendGroup(
+        "flow_control", flow_control_probability);
+
+    int trial_grp = trial->group();
+    if (trial_grp == spdy3_grp) {
+      net::HttpStreamFactory::EnableSPDY3();
+    } else if (trial_grp == flow_control_grp) {
+      net::HttpStreamFactory::EnableFlowControl();
+    }
+  }
 }
 
 // If --socket-reuse-policy is not specified, run an A/B test for choosing the