DownloadManager intereface refactoring to allow cleaner DownloadItem unit tests.

content/public/browser/download_manager_delegate.h

Index: content/public/browser/download_manager_delegate.h
diff --git a/content/public/browser/download_manager_delegate.h b/content/public/browser/download_manager_delegate.h
index 35c60ccb22e37a467b09714a728998e9a7fbb9ef..f9028829df76af52feaf98b9c9c766e4e959cfa6 100644
--- a/content/public/browser/download_manager_delegate.h
+++ b/content/public/browser/download_manager_delegate.h
@@ -54,7 +54,7 @@ class DownloadManagerDelegate {
   // Allows the delegate to override completion of the download.  If this
   // function returns false, the download completion is delayed and the
   // delegate is responsible for making sure that
-  // DownloadManager::MaybeCompleteDownload is called at some point in the
+  // DownloadItem::MaybeCompleteDownload is called at some point in the
   // future.  Note that at that point this function will be called again,
   // and is responsible for returning true when it really is ok for the
   // download to complete.