Move TextResourceDecoder from loader/ to fetch/

Move TextResourceDecoder from loader/ to fetch/

TextResourceDecoder is used by many classes including one from fetch/
and it is not tied to page navigation which loader/ is responsible for.

BUG=280939
R=japhet,abarth
TEST=none

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=156978

[Hajime Morrita, 2013-08-30 07:16:16]

PTAL?

[abarth-chromium, 2013-08-30 07:19:44]

LGTM

I'm not sure I fully understand TextResourceDecoder role's in the world.  It
seems like a lower level concept than fetch, but it has all kinds of crazy
dependencies on things like the HTML parser.

[commit-bot: I haz the power, 2013-08-30 09:16:11]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/morrita@chromium.org/23623012/1

[gmorrita, 2013-08-30 09:17:02]

On 2013/08/30 07:19:44, abarth wrote:
> LGTM
> 
> I'm not sure I fully understand TextResourceDecoder role's in the world.  It
> seems like a lower level concept than fetch, but it has all kinds of crazy
> dependencies on things like the HTML parser.

Yeah, I thought this should be in platform/ at first then found such dependency
:-/

[commit-bot: I haz the power, 2013-08-30 10:33:01]

Change committed as 156978