Get ResourceType from WebURLRequest rather than TargetType.

Get ResourceType from WebURLRequest rather than TargetType.

'WebURLRequest::TargetType' has been dropped in Blink in favor of
'RequestContext' and 'FrameType', matching the Fetch specification's
changes, and allowing both more granularity in various Blink-side checks
and more clarity around the thing that caused a request, and the frame
that the request affects.

This CL should have zero practical effect, as it's simply hoisting the
translation work that 'WebURLRequest::targetType' is already doing
up into the content layer to bring us one step closer to removing the
concept entirely.

BUG=390497
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=284924

[Mike West, 2014-07-21 16:14:45]

Hi Darin. Here's another CL in the series.

-mike

[Mike West, 2014-07-23 08:46:42]

Jochen, would you mind taking a look at this?

-mike

[jochen (gone - plz use gerrit), 2014-07-23 09:10:10]

lgtm

[Mike West, 2014-07-23 09:21:26]

The CQ bit was checked by mkwst@chromium.org

[commit-bot: I haz the power, 2014-07-23 09:22:21]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mkwst@chromium.org/409593002/1

[Mike West, 2014-07-23 09:36:08]

The CQ bit was checked by mkwst@chromium.org

[commit-bot: I haz the power, 2014-07-23 09:37:20]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mkwst@chromium.org/409593002/20001

[commit-bot: I haz the power, 2014-07-23 14:41:51]

Change committed as 284924