Add disabled origin trial feature list

chrome/renderer/origin_trials/origin_trial_key_manager.cc

Index: chrome/renderer/origin_trials/origin_trial_key_manager.cc
diff --git a/chrome/renderer/origin_trials/origin_trial_key_manager.cc b/chrome/renderer/origin_trials/origin_trial_key_manager.cc
index 8f6beb5ac0a95ef411803122d4f67ef2d5f9d4ca..1ac7bfc9d753f4f81fff74a450a07475ffbccdb3 100644
--- a/chrome/renderer/origin_trials/origin_trial_key_manager.cc
+++ b/chrome/renderer/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 +41,17 @@ bool OriginTrialKeyManager::SetPublicKeyFromASCIIString(
 base::StringPiece OriginTrialKeyManager::GetPublicKey() const {
   return base::StringPiece(public_key_);
 }
+
+bool OriginTrialKeyManager::SetDisabledFeatures(
+    const std::string& disabled_feature_list) {
+  std::vector<std::string> features =
+      base::SplitString(disabled_feature_list, "|", base::TRIM_WHITESPACE,
+                        base::SPLIT_WANT_NONEMPTY);
+  for (std::string feature : features)
+    disabled_features_.insert(feature);
+  return true;
+}
+
+bool OriginTrialKeyManager::IsFeatureDisabled(const std::string& feature) {
+  return disabled_features_.count(feature) > 0;
+}