Added last_access_time to DownloadItem and History DB

content/public/test/mock_download_item.h

Index: content/public/test/mock_download_item.h
diff --git a/content/public/test/mock_download_item.h b/content/public/test/mock_download_item.h
index 286176d8a4c2a19ea8df423b536072f35aed15bf..08d08f559df71422b64f52c31951f2ce48a371cd 100644
--- a/content/public/test/mock_download_item.h
+++ b/content/public/test/mock_download_item.h
@@ -96,11 +96,13 @@ class MockDownloadItem : public DownloadItem {
   MOCK_CONST_METHOD0(GetOpenWhenComplete, bool());
   MOCK_METHOD0(GetAutoOpened, bool());
   MOCK_CONST_METHOD0(GetOpened, bool());
+  MOCK_CONST_METHOD0(GetLastAccessTime, base::Time());
   MOCK_CONST_METHOD0(GetBrowserContext, BrowserContext*());
   MOCK_CONST_METHOD0(GetWebContents, WebContents*());
   MOCK_METHOD1(OnContentCheckCompleted, void(DownloadDangerType));
   MOCK_METHOD1(SetOpenWhenComplete, void(bool));
   MOCK_METHOD1(SetOpened, void(bool));
+  MOCK_METHOD1(SetLastAccessTime, void(const base::Time&));
   MOCK_METHOD1(SetDisplayName, void(const base::FilePath&));
   MOCK_CONST_METHOD1(DebugString, std::string(bool));