Fix warning prompting on closing a window that will cancel downloads.

chrome/browser/download/download_service.h

Index: chrome/browser/download/download_service.h
diff --git a/chrome/browser/download/download_service.h b/chrome/browser/download/download_service.h
index 4d754b0fe9fc72ce1469a95038e4a5a0c8cb321a..2cc65706f09b5324f90b5e168156ed945f132f21 100644
--- a/chrome/browser/download/download_service.h
+++ b/chrome/browser/download/download_service.h
@@ -29,6 +29,12 @@ class DownloadService : public ProfileKeyedService {
   // Has a download manager been created?  (By calling above function.)
   bool HasCreatedDownloadManager();
 
+  // Number of downloads associated with this instance of the service.
+  int DownloadCount() const;
+
+  // Number of downloads associated with all profiles.
+  static int DownloadCountAllProfiles();
+
   // Sets the DownloadManagerDelegate associated with this object and
   // its DownloadManager.  Takes ownership of |delegate|, and destroys
   // the previous delegate.  For testing.