Add a probability to Alternate-Protocol support.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 4c8135fd6443670b125e36afa32955dc0f44b588..f1ab7fd51c88abb027a5fd13aa24b578afe8c13c 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -52,6 +52,12 @@ const char kAllowOutdatedPlugins[]          = "allow-outdated-plugins";
 // URLs. This provides an override to get the old insecure behavior.
 const char kAllowRunningInsecureContent[]   = "allow-running-insecure-content";
 
+// Specifies the threshold to be used when determining of an Alternate-Protocol
+// advertisment will be honored. If the advertised probability is larger

[ramant (doing other things), 2014/06/27 22:38:13]

nit: advertisment -> advertisement

[Ryan Hamilton, 2014/06/30 19:02:34]

Done.

+// than the threshold, then it will be honored.
+const char kAlternateProtocolProbabilityThreshold[] =
+    "alternate-protocol-probability-threshold";
+
 // Prevents Chrome from requiring authorization to run certain widely installed
 // but less commonly used plug-ins.
 const char kAlwaysAuthorizePlugins[]        = "always-authorize-plugins";