Add --enable-websocket-over-spdy command-line flag

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 14765b84630ee50bebacfaff57794489371cb659..a1d3038dd240636538b8c78fcdde51e521e403de 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -527,6 +527,9 @@ const char kEnableVerticalTabs[]            = "enable-vertical-tabs";
 // Order of the listed sub-arguments does not matter.
 const char kEnableWatchdog[]                = "enable-watchdog";
 
+// Use WebSocket over SPDY.
+const char kEnableWebSocketOverSpdy[]       = "enable-websocket-over-spdy";
+
 // Enables experimental features for Spellchecker. Right now, the first
 // experimental feature is auto spell correct, which corrects words which are
 // misppelled by typing the word with two consecutive letters swapped. The