sql::MetaTable.next_download_id, DownloadManager::GetNextId()

chrome/browser/download/download_prefs.h

Index: chrome/browser/download/download_prefs.h
diff --git a/chrome/browser/download/download_prefs.h b/chrome/browser/download/download_prefs.h
index cd7bad44e961bc81369d67d8d1d3d9be28c9dce3..3c30b705fa0602a9827a5b09152f9c659b5cbb6e 100644
--- a/chrome/browser/download/download_prefs.h
+++ b/chrome/browser/download/download_prefs.h
@@ -21,6 +21,10 @@ class DownloadPrefs {
 
   static void RegisterUserPrefs(PrefService* prefs);
 
+  // Return the next download id and increment the counter. Must be called on
+  // the UI thread.
+  int GetNextId();
+
   FilePath download_path() const { return *download_path_; }
   int save_file_type() const { return *save_file_type_; }
 
@@ -53,6 +57,7 @@ class DownloadPrefs {
 
   PrefService* prefs_;
 
+  IntegerPrefMember next_download_id_;
   BooleanPrefMember prompt_for_download_;
   FilePathPrefMember download_path_;
   IntegerPrefMember save_file_type_;