Add disabled origin trial feature list

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 78b21ea87ea19d1588c72dfc3e3a30419d28bd3b..24d63e665ca8786a27ccc1b40ec9b87a3357e1d8 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -784,6 +784,10 @@ const char kOriginToForceQuicOn[]           = "origin-to-force-quic-on";
 // chrome process started. (See ProcessSingleton for more details.)
 const char kOriginalProcessStartTime[]      = "original-process-start-time";
 
+// Contains a list of experimental feature names which should not be included in
+// origin trials. Names should be separated by "|" characters.
+const char kOriginTrialDisabledFeatures[] = "origin-trial-disabled-features";
+
 // Overrides the default public key for checking origin trial tokens.
 const char kOriginTrialPublicKey[] = "origin-trial-public-key";