Detect sync server communication errors

chrome/browser/sync/engine/syncer.cc

Index: chrome/browser/sync/engine/syncer.cc
diff --git a/chrome/browser/sync/engine/syncer.cc b/chrome/browser/sync/engine/syncer.cc
index f6490c5831233111a556c58f75ee7ad812cce9b7..bbce9c34cb09d861f3903017ed21651f3f4bb44b 100644
--- a/chrome/browser/sync/engine/syncer.cc
+++ b/chrome/browser/sync/engine/syncer.cc
@@ -144,7 +144,8 @@ void Syncer::SyncShare(sessions::SyncSession* session,
       }
       case DOWNLOAD_UPDATES: {
         DownloadUpdatesCommand download_updates;
-        download_updates.Execute(session);
+        session->mutable_status_controller()->set_last_download_updates_result(
+            download_updates.Execute(session));
         next_step = PROCESS_CLIENT_COMMAND;
         break;
       }
@@ -222,14 +223,17 @@ void Syncer::SyncShare(sessions::SyncSession* session,
       }
       case POST_COMMIT_MESSAGE: {
         PostCommitMessageCommand post_commit_command;
-        post_commit_command.Execute(session);
+        session->mutable_status_controller()->set_last_post_commit_result(
+            post_commit_command.Execute(session));
         next_step = PROCESS_COMMIT_RESPONSE;
         break;
       }
       case PROCESS_COMMIT_RESPONSE: {
         session->mutable_status_controller()->reset_num_conflicting_commits();
         ProcessCommitResponseCommand process_response_command;
-        process_response_command.Execute(session);
+        session->mutable_status_controller()->
+            set_last_process_commit_response_result(
+                process_response_command.Execute(session));
         next_step = BUILD_AND_PROCESS_CONFLICT_SETS;
         break;
       }