Make DownloadHistory observe manager, items

content/public/test/download_test_observer.cc

Index: content/public/test/download_test_observer.cc
diff --git a/content/public/test/download_test_observer.cc b/content/public/test/download_test_observer.cc
index c802b50e0d6ad5838814eb84439ff8815a40510d..49fe7b92a37b1eaed2c6264ee671772d79df6e76 100644
--- a/content/public/test/download_test_observer.cc
+++ b/content/public/test/download_test_observer.cc
@@ -131,6 +131,12 @@ void DownloadTestObserver::OnDownloadUpdated(DownloadItem* download) {
     DownloadInFinalState(download);
 }
 
+void DownloadTestObserver::OnDownloadCreated(
+    DownloadManager* manager, DownloadItem* item) {
+  item->AddObserver(this);
+  downloads_observed_.insert(item);
+}
+
 void DownloadTestObserver::ModelChanged(DownloadManager* manager) {
   DCHECK_EQ(manager, download_manager_);
 
@@ -151,6 +157,7 @@ void DownloadTestObserver::ModelChanged(DownloadManager* manager) {
     DownloadSet::iterator observed_it(downloads_observed_.find(*it));
 
     // If it isn't finished and we're aren't observing it, start.
+    // Usually, OnDownloadCreated should have started observing it.
     if (finished_it == finished_downloads_.end() &&
         observed_it == downloads_observed_.end()) {
       (*it)->AddObserver(this);