[Downloads/History] Add tab-url and tab-referrer-url to DownloadRow

components/test/data/history/README.md

Index: components/test/data/history/README.md
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+## How to generate history.N.sql files using a Chromium build.
+
+On a Linux build:
+
+1. Build the `sqlite_shell` target. This will build the [SQLite CLI].
+
+        $ ninja sqlite_shell
+
+2. Run Chrome/Chromium with a fresh profile directory and immediately quit. It
+   doesn't really matter how long you run it, but there'll be less work for you
+   if you quit early.
+
+        $ out/Debug/chrome-wrapper --user-data-dir=foo
+
+3. Locate the `History` file in the profile directory.
+
+4. Dump the `History` database into a text file:
+
+        $ echo '.dump' | sqlite_shell foo/Default/History > history.sql
+
+5. Manually remove all `INSERT INTO` statements other than the statements
+   populating the `meta` table.
+
+[SQLite CLI]: https://www.sqlite.org/cli.html
+