[Android] Ignore isSystemKey from the framework.

[Android] Ignore isSystemKey from the framework.

Force isSystemKey flag to false as the Android framework is changing
this behavior and this is breaking DPAD keys.

BUG=b/14438911
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=269302

[Primiano Tucci (use gerrit), 2014-05-06 15:55:00]

Aurimas, how would you feel seeing a change like this?
I have absolutely no idea what is a "system" key and what it purpose should be
*.

I just *feel* that the assumption that DPAD keys are not system keys can be
wrong in some cases, and if that happens that will break DPAD keys / key
navigation.
I can provide more details in private (or see the internal bug linked).
Do you feel this is likely to break something else?

* The Android framework JavaDoc for isSystemKey says, literally:
"Is this a system key? System keys can not be used for menu shortcuts. TODO:
this information should come from a table somewhere. TODO: should the dpad keys
be here? arguably, because they also shouldn't be menu shortcuts"

which is not really helping.

[Primiano Tucci (use gerrit), 2014-05-08 11:08:32]

I did a smoke test with https://thefiletree.com/primiano/form.html?plug=none and
the JS key modifiers seem to work consistently.

[benm (inactive), 2014-05-08 11:09:17]

lgtm

[Primiano Tucci (use gerrit), 2014-05-08 11:18:19]

The CQ bit was checked by primiano@chromium.org

[commit-bot: I haz the power, 2014-05-08 11:21:21]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/primiano@chromium.org/267903005/1

[commit-bot: I haz the power, 2014-05-08 18:17:41]

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...)

[Primiano Tucci (use gerrit), 2014-05-08 18:20:49]

Adding NOTRY, win_rel flake as usual :/

[Primiano Tucci (use gerrit), 2014-05-08 18:21:02]

The CQ bit was unchecked by primiano@chromium.org

[Primiano Tucci (use gerrit), 2014-05-08 18:21:05]

The CQ bit was checked by primiano@chromium.org

[commit-bot: I haz the power, 2014-05-08 18:27:24]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/primiano@chromium.org/267903005/1

[commit-bot: I haz the power, 2014-05-09 15:05:08]

Change committed as 269302