Add disabled origin trial feature list

chrome/common/origin_trials/origin_trial_key_manager.cc

Index: chrome/common/origin_trials/origin_trial_key_manager.cc
diff --git a/chrome/common/origin_trials/origin_trial_key_manager.cc b/chrome/common/origin_trials/origin_trial_key_manager.cc
index 12467d29e0300b0297cfa816715ff086e5894c25..f21a3a16360bac90863717488189ee0ff0c3ac59 100644
--- a/chrome/common/origin_trials/origin_trial_key_manager.cc
+++ b/chrome/common/origin_trials/origin_trial_key_manager.cc
@@ -6,7 +6,10 @@
 
 #include <stdint.h>
 
+#include <vector>
+
 #include "base/base64.h"
+#include "base/strings/string_split.h"
 
 // This is the default public key used for validating signatures.
 // TODO(iclelland): Provide a mechanism to allow for multiple signing keys.
@@ -38,3 +41,19 @@ bool OriginTrialKeyManager::SetPublicKeyFromASCIIString(
 base::StringPiece OriginTrialKeyManager::GetPublicKey() const {
   return base::StringPiece(public_key_);
 }
+
+bool OriginTrialKeyManager::SetDisabledFeatures(
+    const std::string& disabled_feature_list) {
+  std::set<std::string> new_disabled_features;
+  const std::vector<std::string> features =
+      base::SplitString(disabled_feature_list, "|", base::TRIM_WHITESPACE,
+                        base::SPLIT_WANT_NONEMPTY);
+  for (const std::string& feature : features)
+    new_disabled_features.insert(feature);
+  disabled_features_.swap(new_disabled_features);
+  return true;
+}
+
+bool OriginTrialKeyManager::IsFeatureDisabled(base::StringPiece feature) const {
+  return disabled_features_.count(feature.as_string()) > 0;
+}