Remove 'WebURLRequest::TargetType' from 'content::RenderFrameImpl'.

Remove 'WebURLRequest::TargetType' from 'content::RenderFrameImpl'.

'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::setTargetType' is already doing
up into the content layer to bring us one step closer to removing the
concept entirely.

There's still one call to 'ResourceType::FromTargetType' in
RenderFrameImpl that this CL doesn't remove: that method will be
converted to RequestContext in a future CL.

BUG=390497
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=284520

[Mike West, 2014-07-21 16:11:30]

jam@ mind taking a look at this CL?

-mike

[jam, 2014-07-21 17:09:08]

lgtm

[Mike West, 2014-07-21 17:38:15]

The CQ bit was checked by mkwst@chromium.org

[commit-bot: I haz the power, 2014-07-21 17:39:55]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mkwst@chromium.org/403323003/1

[commit-bot: I haz the power, 2014-07-21 22:36:46]

Change committed as 284520