Recreate .autoreg even if it already exists, so that we're sure the newer timestamp will trigger component registration on startup. Bug 279800, r=bsmedberg, sr=darin.

xpinstall/src/nsInstall.cpp

@@ -137,20 +137,19 @@ NS_SoftwareUpdateRequestAutoReg()
   }
 
   file->AppendNative(nsDependentCString(".autoreg"));
-  PRBool condition;
-  if (NS_SUCCEEDED(file->Exists(&condition)) && condition) {
-    if (NS_SUCCEEDED(file->IsFile(&condition)) && condition)
-      return;
 #ifdef DEBUG_timeless
-    if (NS_SUCCEEDED(file->IsDirectory(&condition)) && condition) {
-      /* someone did this intentionally, no point in complaining */
-      return;
-    }
-#endif
-    NS_WARNING("Found an .autoreg object, but it isn't a file or directory");
+  PRBool condition;
+  if (NS_SUCCEEDED(file->IsDirectory(&condition)) && condition) {
+    /* someone did this intentionally, no point in complaining */
     return;
   }
+#endif
 
+  // Remove and recreate the file to update its timestamp.
+  // .autoreg must be newer than compreg.dat for component registration
+  // to occur.
+
+  file->Remove(PR_FALSE);
   rv = file->Create(nsIFile::NORMAL_FILE_TYPE, 0666);
 
   if (NS_FAILED(rv)) {