Implement Token Binding negotiation TLS extension

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 4433b84d48d8bde1d6020b8edb3d35ac087aa932..0430ec29246608b6c57013f0d39dda11d14306b1 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -548,6 +548,10 @@ const char kEnableTabAudioMuting[]  = "enable-tab-audio-muting";
 // instant-extended-api, where thumbnails are generally smaller.
 const char kEnableThumbnailRetargeting[]   = "enable-thumbnail-retargeting";
 
+// Enables negotiating token binding (draft-ietf-tokbind-protocol-02) in the tls
+// handshake.
+const char kEnableTokenBinding[] = "enable-token-binding";
+
 // Enables Alternate-Protocol when the port is user controlled (> 1024).
 const char kEnableUserAlternateProtocolPorts[] =
     "enable-user-controlled-alternate-protocol-ports";