Downloads: Added transient flag to download item and download database

content/public/browser/download_item.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Each download is represented by a DownloadItem, and all DownloadItems
 // are owned by the DownloadManager which maintains a global list of all
 // downloads. DownloadItems are created when a user initiates a download,
 // and exist for the duration of the browser life time.
 //
 // Download observers:
@@ skipping 382 matching lines @@
   // Returns true if the download has been auto-opened by the system.
   virtual bool GetAutoOpened() = 0;
 
   // Returns true if the download has been opened.
   virtual bool GetOpened() const = 0;
 
   // Time the download was last accessed. Returns NULL if the download has never
   // been opened.
   virtual base::Time GetLastAccessTime() const = 0;
 
+  // Returns whether the download item should be visible in the UI.
+  virtual bool IsVisible() const = 0;
+
   //    Misc State accessors ---------------------------------------------------
 
   // BrowserContext that indirectly owns this download. Always valid.
   virtual BrowserContext* GetBrowserContext() const = 0;
 
   // WebContents associated with the download. Returns nullptr if the
   // WebContents is unknown or if the download was not performed on behalf of a
   // renderer.
   virtual WebContents* GetWebContents() const = 0;
 
@@ skipping 21 matching lines @@
   // return |name|. Has no effect on the final target filename.
   virtual void SetDisplayName(const base::FilePath& name) = 0;
 
   // Debug/testing -------------------------------------------------------------
   virtual std::string DebugString(bool verbose) const = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DOWNLOAD_ITEM_H_