Don't crash if the translate server reports a language we don't know

When Chrome translates a page, the translate server might detect that the page is in a different language than the one Chrome detected.
If that language is not in the list of languages that Chrome supports for translation, then we do not know what to show and we were crashing.
This CL makes it so that we show an error infobar instead.
Note that in the future we should improve the "after translate" infobar to support showing the original language as unknown. (http://crbug.com/9390)

BUG=48918
TEST=Not sure how to test without changing the code.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=52876

[sky, 2010-07-17 17:08:05]

http://codereview.chromium.org/3011008/diff/2001/3001
File chrome/app/generated_resources.grd (right):

http://codereview.chromium.org/3011008/diff/2001/3001#newcode7144
chrome/app/generated_resources.grd:7144: This page has been translated from an
unknown language to <ph name="language_language">$1<ex>English</ex></ph>
Should it be from an unknown language or to an unknown language?

http://codereview.chromium.org/3011008/diff/2001/3006
File chrome/renderer/render_view.cc (right):

http://codereview.chromium.org/3011008/diff/2001/3006#newcode846
chrome/renderer/render_view.cc:846: "qbz" /* language */,
IsPageTranslatable(&document)));
Is this intentional?

[Jay Civelli, 2010-07-18 08:11:15]

http://codereview.chromium.org/3011008/diff/2001/3001
File chrome/app/generated_resources.grd (right):

http://codereview.chromium.org/3011008/diff/2001/3001#newcode7144
chrome/app/generated_resources.grd:7144: This page has been translated from an
unknown language to <ph name="language_language">$1<ex>English</ex></ph>
On 2010/07/17 17:08:06, sky wrote:
> Should it be from an unknown language or to an unknown language?

It really is "from an unknown to language to <Chrome's UI language>".
The idea is that you visited a page and selected the context menu "Translate to
English". Chrome did not know the language of the page and the server returned a
language code Chrome does not understand.

http://codereview.chromium.org/3011008/diff/2001/3006
File chrome/renderer/render_view.cc (right):

http://codereview.chromium.org/3011008/diff/2001/3006#newcode846
chrome/renderer/render_view.cc:846: "qbz" /* language */,
IsPageTranslatable(&document)));
On 2010/07/17 17:08:06, sky wrote:
> Is this intentional?

Ouch, debug code left over!
Removed.

[sky, 2010-07-18 23:34:27]

LGTM