Downloads: Added transient flag to download item and download database

content/browser/download/download_manager_impl.cc

Index: content/browser/download/download_manager_impl.cc
diff --git a/content/browser/download/download_manager_impl.cc b/content/browser/download/download_manager_impl.cc
index ab6cf47d7c52378d79a1564ee584f4d734639fdb..83c279fc8e517e69c10ffb0f5fb15c8afca7f168 100644
--- a/content/browser/download/download_manager_impl.cc
+++ b/content/browser/download/download_manager_impl.cc
@@ -142,6 +142,7 @@ class DownloadItemFactoryImpl : public DownloadItemFactory {
       DownloadInterruptReason interrupt_reason,
       bool opened,
       base::Time last_access_time,
+      bool transient,
       const std::vector<DownloadItem::ReceivedSlice>& received_slices,
       const net::NetLogWithSource& net_log) override {
     return new DownloadItemImpl(
@@ -149,7 +150,7 @@ class DownloadItemFactoryImpl : public DownloadItemFactory {
         referrer_url, site_url, tab_url, tab_refererr_url, mime_type,
         original_mime_type, start_time, end_time, etag, last_modified,
         received_bytes, total_bytes, hash, state, danger_type, interrupt_reason,
-        opened, last_access_time, received_slices, net_log);
+        opened, last_access_time, transient, received_slices, net_log);
   }
 
   DownloadItemImpl* CreateActiveItem(
@@ -653,6 +654,7 @@ DownloadItem* DownloadManagerImpl::CreateDownloadItem(
     DownloadInterruptReason interrupt_reason,
     bool opened,
     base::Time last_access_time,
+    bool transient,
     const std::vector<DownloadItem::ReceivedSlice>& received_slices) {
   if (base::ContainsKey(downloads_, id)) {
     NOTREACHED();
@@ -664,7 +666,7 @@ DownloadItem* DownloadManagerImpl::CreateDownloadItem(
       site_url, tab_url, tab_refererr_url, mime_type, original_mime_type,
       start_time, end_time, etag, last_modified, received_bytes, total_bytes,
       hash, state, danger_type, interrupt_reason, opened, last_access_time,
-      received_slices,
+      transient, received_slices,
       net::NetLogWithSource::Make(net_log_, net::NetLogSourceType::DOWNLOAD));
   downloads_[id] = base::WrapUnique(item);
   downloads_by_guid_[guid] = item;