Fix a bug that incorrectly kicked off the upgrade task.

BUG=104790
TEST=Launch app, verify that upgrade is not detected inappropriately.
Review URL: http://codereview.chromium.org/8588066

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110819 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/upgrade_detector_impl.cc

@@ -76,14 +76,6 @@ class DetectUpgradeTask : public Task {
         is_critical_upgrade_(is_critical_upgrade) {
   }
 
-  virtual ~DetectUpgradeTask() {
-    if (!upgrade_detected_task_.is_null()) {
-      // This has to get deleted on the same thread it was created.
-      BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-                              upgrade_detected_task_);
-    }
-  }
-
   virtual void Run() {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));