Make use of the new UpdateActiveSetupVersionWorkItem.

chrome/installer/setup/install.cc

Index: chrome/installer/setup/install.cc
diff --git a/chrome/installer/setup/install.cc b/chrome/installer/setup/install.cc
index 13ff242d87ad18059d89d7e522292dc8f8df599e..b1ff4ac74a1c02f9379674bd6cfccab01155ae1d 100644
--- a/chrome/installer/setup/install.cc
+++ b/chrome/installer/setup/install.cc
@@ -629,8 +629,22 @@ void HandleOsUpgradeForBrowser(const installer::InstallerState& installer_state,
 
     UpdateOsUpgradeBeacon(installer_state.system_install(),
                           BrowserDistribution::GetDistribution());
-    if (!installer_state.system_install())
+
+    // Update the per-user default-browser-beacon. For user-level installs this

[grt (UTC plus 2), 2015/07/09 14:24:22]

nit: "default browser beacon" for consistency with comments in shell_util.h.

[gab, 2015/07/09 20:41:00]

Done.

+    // can be done directly; whereas it requires triggering Active Setup for
+    // each users' subsequent login on system-level installs.

[grt (UTC plus 2), 2015/07/09 14:24:22]

english nit: users' -> user's ("each user" is singular)

[gab, 2015/07/09 20:41:00]

Done.

+    if (!installer_state.system_install()) {
       UpdateDefaultBrowserBeaconForPath(chrome_exe);
+    } else {
+      UpdateActiveSetupVersionWorkItem active_setup_work_item(
+          InstallUtil::GetActiveSetupPath(chrome.distribution()),
+          UpdateActiveSetupVersionWorkItem::
+              UPDATE_AND_BUMP_OS_UPGRADES_COMPONENT);
+      if (active_setup_work_item.Do())
+        VLOG(1) << "Bumped Active Setup Version on-os-upgrade.";
+      else
+        LOG(ERROR) << "Bumping Active Setup Version on-os-upgrade failed.";

[grt (UTC plus 2), 2015/07/09 14:24:22]

nit: it looks like more than half of the error messages like this in the
installer begin with "Failed to...". how do you feel about changing it to be
consistent with them?

[gab, 2015/07/09 20:41:00]

Sure, kind of redundant with "Error: (...)" but my message ended with "failed"
anyways so not much better :-).

+    }
   }
 }