Registering field trial for a feature overridden in chrome://flags.

components/flags_ui/flags_state.h

Index: components/flags_ui/flags_state.h
diff --git a/components/flags_ui/flags_state.h b/components/flags_ui/flags_state.h
index 6f0ff1f87c865a5ddaa587a9c2d7c10ac50613ff..2be899cc05e89824fab6a31d6cce6ce228010e48 100644
--- a/components/flags_ui/flags_state.h
+++ b/components/flags_ui/flags_state.h
@@ -16,6 +16,7 @@
 #include "base/macros.h"
 
 namespace base {
+class FeatureList;
 class ListValue;
 }
 
@@ -80,9 +81,12 @@ class FlagsState {
   void ResetAllFlags(FlagsStorage* flags_storage);
   void Reset();
 
-  // Registers variations parameter values stored in |flags_storage| (previously
-  // selected in about:flags).
-  void RegisterAllFeatureVariationParameters(FlagsStorage* flags_storage);
+  // Registers variations parameter values selected for features in about:flags.
+  // The selected flags are retrieved from |flags_storage|, the registered
+  // variation parameters are connected to their corresponding features in
+  // |feature_list|.
+  void RegisterAllFeatureVariationParameters(FlagsStorage* flags_storage,
+                                             base::FeatureList* feature_list);
 
   // Gets the list of feature entries. Entries that are available for the
   // current platform are appended to |supported_entries|; all other entries are