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

chrome/browser/download/download_prefs.cc

Index: chrome/browser/download/download_prefs.cc
diff --git a/chrome/browser/download/download_prefs.cc b/chrome/browser/download/download_prefs.cc
index c627bf7896c6424f8362956e2f4dde6c4693dc90..9b2758dcf0a209cac6f86c85e1e4b1462d234320 100644
--- a/chrome/browser/download/download_prefs.cc
+++ b/chrome/browser/download/download_prefs.cc
@@ -18,6 +18,7 @@
 #include "content/browser/browser_thread.h"
 
 DownloadPrefs::DownloadPrefs(PrefService* prefs) : prefs_(prefs) {
+  next_download_id_.Init(prefs::kNextDownloadId, prefs, NULL);
   prompt_for_download_.Init(prefs::kPromptForDownload, prefs, NULL);
   download_path_.Init(prefs::kDownloadDefaultDirectory, prefs, NULL);
   save_file_type_.Init(prefs::kSaveFileType, prefs, NULL);
@@ -47,6 +48,9 @@ DownloadPrefs::~DownloadPrefs() {
 
 // static
 void DownloadPrefs::RegisterUserPrefs(PrefService* prefs) {
+  prefs->RegisterIntegerPref(prefs::kNextDownloadId,
+                             0,
+                             PrefService::UNSYNCABLE_PREF);
   prefs->RegisterBooleanPref(prefs::kPromptForDownload,
                              false,
                              PrefService::SYNCABLE_PREF);
@@ -135,6 +139,13 @@ void DownloadPrefs::ResetAutoOpen() {
   SaveAutoOpenState();
 }
 
+int DownloadPrefs::GetNextId() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  int next_id = *next_download_id_;
+  prefs_->SetInteger(prefs::kNextDownloadId, next_id + 1);
+  return next_id;
+}
+
 void DownloadPrefs::SaveAutoOpenState() {
   std::string extensions;
   for (AutoOpenSet::iterator it = auto_open_.begin();