Added last_access_time to DownloadItem and History DB

chrome/browser/ntp_snippets/fake_download_item.h

Index: chrome/browser/ntp_snippets/fake_download_item.h
diff --git a/chrome/browser/ntp_snippets/fake_download_item.h b/chrome/browser/ntp_snippets/fake_download_item.h
index 09f54e5d530ad8e475c06c8ee693f9dc19d2bfa0..009e1746182f8d14492b3fdb43d207b4d96b84c9 100644
--- a/chrome/browser/ntp_snippets/fake_download_item.h
+++ b/chrome/browser/ntp_snippets/fake_download_item.h
@@ -115,12 +115,14 @@ class FakeDownloadItem : public content::DownloadItem {
   bool GetOpenWhenComplete() const override;
   bool GetAutoOpened() override;
   bool GetOpened() const override;
+  base::Time GetLastAccessTime() const override;
   content::BrowserContext* GetBrowserContext() const override;
   content::WebContents* GetWebContents() const override;
   void OnContentCheckCompleted(
       content::DownloadDangerType danger_type) override;
   void SetOpenWhenComplete(bool open) override;
   void SetOpened(bool opened) override;
+  void SetLastAccessTime(const base::Time& time) override;
   void SetDisplayName(const base::FilePath& name) override;
   std::string DebugString(bool verbose) const override;