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 37edfd6bc89effc32a4977fb22452687f6c72875..b658b6f79b60c0f6aef6033de515daae91f6d0cb 100644
--- a/chrome/browser/ntp_snippets/fake_download_item.h
+++ b/chrome/browser/ntp_snippets/fake_download_item.h
@@ -113,12 +113,14 @@ 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;