Elevated install of recovery component (UI part).

chrome/browser/upgrade_detector.h

Index: chrome/browser/upgrade_detector.h
diff --git a/chrome/browser/upgrade_detector.h b/chrome/browser/upgrade_detector.h
index cd84b2736dbe1b643d339999c8ef4b2144e0bb2c..4675e57399106476bf60eb56e5bd34852cb21882 100644
--- a/chrome/browser/upgrade_detector.h
+++ b/chrome/browser/upgrade_detector.h
@@ -46,6 +46,9 @@ class UpgradeDetector {
 
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
+  // Triggers an upgrade check.
+  virtual void CheckForUpgrade() = 0;
+
   // Whether the user should be notified about an upgrade.
   bool notify_upgrade() const { return notify_upgrade_; }
 
@@ -60,6 +63,12 @@ class UpgradeDetector {
     return upgrade_available_ == UPGRADE_NEEDED_OUTDATED_INSTALL_NO_AU;
   }
 
+  // Whether elevation is needed to recover the upgrade channel (Omaha, and
+  // interaction between Omaha and Chrome).
+  bool is_elevation_needed_for_recovery() const {
+    return upgrade_available_ == UPGRADE_NEEDS_ELEVATION;
+  }
+
   // Notifify this object that the user has acknowledged the critical update
   // so we don't need to complain about it for now.
   void acknowledge_critical_update() {
@@ -114,6 +123,8 @@ class UpgradeDetector {
     // If no update to Chrome has been installed for more than the recommended
     // time AND auto-update is turned off.
     UPGRADE_NEEDED_OUTDATED_INSTALL_NO_AU,
+    // If upgrade recovery needs elevation.
+    UPGRADE_NEEDS_ELEVATION,
   } upgrade_available_;
 
   // Whether the user has acknowledged the critical update.