Oilpan: remove now-unused WebNode(Member<T>) constructor.

Oilpan: remove now-unused WebNode(Member<T>) constructor.

The (implicit) construction of a WebNode from a Member<T> (where T is
convertible to a Node) was introduced to allow for assignment of a
Member<Element> to a WebNode (as needed by http://crrev.com/280123002/)

With http://crrev.com/313813002 (r175522), an operator conversion from
Member<T> to RawPtr<T> was introduced, which makes the reason for having
the above WebNode() constructor fall away. Remove it here.

R=abarth@chromium.org
BUG=357163
NOTRY=true

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=178296

[sof, 2014-07-16 21:12:32]

Please take a look.

The addition of the #define mapping WebCore to blink in Source/config.h (r178289
- http://crrev.com/399513002), broke Oilpan compilation, e.g.,
  

http://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20Oilpan%...

For reasons not clear, this is due to the availability of the WebNode
constructor 
that's removed here. I suspect it is due to WebNode being in blink:: already and
it becoming available for participation in implicit conversions where it
previously
wasn't, but haven't gone after all the details.

Fixing the Oilpan tree has greater priority, to some extent. I'd like to land
this ASAP.

[abarth-chromium, 2014-07-16 21:21:46]

LGTM

[sof, 2014-07-16 21:23:29]

The CQ bit was checked by sigbjornf@opera.com

[commit-bot: I haz the power, 2014-07-16 21:24:34]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sigbjornf@opera.com/400473002/1

[commit-bot: I haz the power, 2014-07-16 21:25:58]

Change committed as 178296

[haraken, 2014-07-16 23:15:09]

LGTM