Android: use grit target platform instead of define.

Android: use grit target platform instead of define.

grit now supports passing "-t android" to set the target platform to
android, which sets is_android and is_posix, and does *not* set
is_linux (matching the OS_* macros). Use this instead of defining an
"android" macro.

This requires one actual condition change in app_locale_settings as
the Android port was previously depending on is_linux being true for
its definitions of IDS_WEB_FONT_*. The other grd changes are all
trivial substitutions.

BUG=239434
TBR=jamesr@chromium.org, joi@chromium.org, newt@chromium.org, sky@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=201310

[Torne, 2013-05-14 11:32:44]

This depends on https://codereview.chromium.org/14813026/ being landed in grit
and rolled into Chromium. I have tested that the set of generated resources is
identical after this change.

[Jói, 2013-05-14 18:14:13]

LGTM

[newt (away), 2013-05-14 18:53:46]

lgtm

[commit-bot: I haz the power, 2013-05-15 15:48:46]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/torne@chromium.org/14834011/5001

[commit-bot: I haz the power, 2013-05-15 15:58:26]

Retried try job too often on chromium_presubmit for step(s) presubmit
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=chromium_p...

[Torne, 2013-05-15 16:07:10]

Need OWNERS for:

sky: chrome and ui
brettw: content
jamesr: webkit

[jamesr, 2013-05-15 17:12:28]

webkit/ lgtm

[sky, 2013-05-15 21:09:21]

Rubber stamp LGTM

[Torne, 2013-05-21 09:33:00]

TBR'ing brettw as this patch is chasing a moving target :)

[commit-bot: I haz the power, 2013-05-21 09:33:12]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/torne@chromium.org/14834011/16001

[commit-bot: I haz the power, 2013-05-21 15:18:55]

Retried try job too often on win_rel for step(s) browser_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[Torne, 2013-05-21 15:29:31]

Committed patchset #3 manually as r201310 (presubmit successful).