diff --git a/results_feed/doc/results_feed.proto b/results_feed/doc/results_feed.proto
index fdb82f0..a97e2fa 100644
--- a/results_feed/doc/results_feed.proto
+++ b/results_feed/doc/results_feed.proto
@@ -37,12 +37,28 @@
   // Commits to sdk/master are indexed consecutively in the table 'commits'.
   int32 blamelist_start_index = 7;
   int32 blamelist_end_index = 8;  // Inclusive: this commit is in the blamelist.
+  reserved 9;  // Unused
 
   // Optional: The index of a the commit that is responsible for these changes.
   // Chosen by a user in the results feed UI.
   int32 pinned_index = 10;
+  reserved 11, 12;  // Used in TryResult
 
   bool approved = 13; // May be missing in older records, interpreted as false.
+
+  // Configurations where this result is the latest change to
+  // the result of this test are considered active. If a new change comes in,
+  // changing the result of this test on a configuration, that configuration is
+  // removed from the set active_configurations.
+  // The 'active' and 'active_configurations' fields are present only if there
+  // are some active configurations remaining.
+
+  // Present, and true, if this result is still active on some configuration.
+  bool active = 14;
+
+  // Present only if nonempty. The configurations on which this is
+  // the latest change to this test's result.
+  repeated string active_configurations = 15;
 }
 
 // Similar to a Result message, but representing results from a try builder.
@@ -94,14 +110,15 @@
   string id = 1;
   int32 build_number = 2;
   string builder = 3;
-  int32 review = 9;
-  int32 patchset = 10;
-  string buildbucket_id = 11;
+  reserved 4;
   int32 num_chunks = 5; // The number of chunks of results for this build.
   int32 processed_chunks = 6; // The number of results chunks received.
   // True if no new unapproved failures have been received.
   bool success = 7;
   bool completed = 8;  // True if all chunks have been received.
+  int32 review = 9;
+  int32 patchset = 10;
+  string buildbucket_id = 11;
 }
 
 message Commit {
@@ -156,17 +173,14 @@
   string id = 1;
 
   // The email address of the user who made this comment/approval.
-  string user = 2;
+  string author = 2;
 
   // The time that the comment/approval was entered
   google.protobuf.Timestamp created = 3;
 
   // The text of the comment (optional if link is present).
   string comment = 4;
-
-  // The URL of a link to an issue (optional).
-  string link = 5;
-
+  reserved 5;
   // If approved is true, this comment approves the linked tests
   // If approved is false, it removes any earlier approvals on these tests
   // If the field is missing, it does not change the current approval status
@@ -178,13 +192,9 @@
   // fields will be missing.
   repeated string results = 7;
   repeated string try_results = 8;
-
-  // The base comment, if this comment is a reply to a previous comment.
-  // All comments link to the beginning of their reply chain, not to the
-  // previous comment, and are only ordered by timestamp.
-  string base_comment = 9;
-
+  reserved 9;
   // These are copies of the fields in the results this comment refers to.
+  // A comment may belong to both a review and to the commit landing the review.
   // These are the fields from a Result message
   int32 blamelist_start_index = 10;
   int32 blamelist_end_index = 11;
diff --git a/results_feed/pubspec.lock b/results_feed/pubspec.lock
index c5b977c..11104f0 100644
--- a/results_feed/pubspec.lock
+++ b/results_feed/pubspec.lock
@@ -450,7 +450,7 @@
     source: hosted
     version: "1.4.0"
   protobuf:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: protobuf
       url: "https://pub.dartlang.org"
@@ -688,4 +688,4 @@
     source: hosted
     version: "2.2.0"
 sdks:
-  dart: ">=2.7.0-dev <=2.8.0-dev.9.0"
+  dart: ">=2.7.0-dev <=2.8.0-dev.11.0"
diff --git a/results_feed/pubspec.yaml b/results_feed/pubspec.yaml
index 622032c..5ffd786 100644
--- a/results_feed/pubspec.yaml
+++ b/results_feed/pubspec.yaml
@@ -13,6 +13,7 @@
   firebase: ^7.0.0
   http: ^0.12.0
   intl: ^0.15.0
+  protobuf: ">=0.13.6"
   quiver: ^2.1.0
   service_worker: ^0.2.2