Resubmit: Add real file for AdNetworks DB

Resubmit: Add real file for AdNetworks DB

This is a resubmit of https://codereview.chromium.org/268063004/.

The previous version was reverted because it caused a memory leak. This was a
problem with RefCounting from ui::ResourceBundle::LoadDataResourceBytes(), which
has been fixed.

Details:
Even though the method returns a non-refcounted ptr to a RefCountedStaticMemory
(which according to the class comment, "the ref counting does not matter" [1]),
the ref-counting _does_ matter. The fix for this went in as part of a refactor
in https://codereview.chromium.org/263953003/.

[1] http://src.chromium.org/viewvc/chrome/trunk/src/base/memory/ref_counted_memory.h?revision=267321 line 44

BUG=357204
TBR=jhawkins@chromium.org (previously approved)
TBR=felt@chromium.org (very minor changes)

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=269494

[Devlin, 2014-05-09 00:52:33]

The CQ bit was checked by rdevlin.cronin@chromium.org

[commit-bot: I haz the power, 2014-05-09 00:57:29]

CQ is trying da patch. Follow status at

https://chromium-status.appspot.com/cq/rdevlin.cronin@chromium.org/274563003/...

[commit-bot: I haz the power, 2014-05-09 04:33:14]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)

[commit-bot: I haz the power, 2014-05-10 02:46:34]

Change committed as 269494

[Alpha Left Google, 2014-05-10 03:18:48]

A revert of this CL has been created in
https://codereview.chromium.org/277133002/ by hclam@chromium.org.

The reason for reverting is: Linux Asan is failing with this patch:
http://build.chromium.org/p/chromium.memory/builders/Linux%20ASan%20LSan%20Te....