Translate: Don't use custom CSS and JavaScript loader on iOS

Translate: Don't use custom CSS and JavaScript loader on iOS

Custom JavaScript loader doesn't work on iOS because an origin check
fails outside v8 isolated world. Chrome should not overwrite these
callbacks on iOS.

BUG=none
TEST=none

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=222254

[jeanfrancois, 2013-09-10 08:43:10]

lgtm

[jeanfrancois, 2013-09-10 08:43:11]

lgtm

[commit-bot: I haz the power, 2013-09-10 08:49:00]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a lowly provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[Takashi Toyoshima, 2013-09-10 08:50:48]

+hajimehoshi

[droger, 2013-09-10 09:02:10]

lgtm

[hajimehoshi, 2013-09-10 09:02:24]

lgtm

[commit-bot: I haz the power, 2013-09-10 09:03:43]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/toyoshim@chromium.org/23715006/3001

[commit-bot: I haz the power, 2013-09-10 10:04:23]

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

[commit-bot: I haz the power, 2013-09-10 11:05:15]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/toyoshim@chromium.org/23715006/3001

[commit-bot: I haz the power, 2013-09-10 12:33:25]

Change committed as 222254