https://bugs.webkit.org/show_bug.cgi?id=120805

Source/WTF:

Reviewed by Andreas Kling.

* wtf/Vector.h:
(WTF::::expandCapacity):
Remove const from the pointer passed to expandCapacity, it can be non-const if we're moving.

(WTF::::append):
Change append to take U&& and use std::forward when constructing the element and when passing
the element along to appendSlowCase if that's necessary.

(WTF::::appendSlowCase):
Use std::forward.

(WTF::::uncheckedAppend):
Rename val to value.

Tools:

Reviewed by Sam Weinig.

Add a test for Vector<MoveOnly>::append.

* TestWebKitAPI/Tests/WTF/Vector.cpp:
(TestWebKitAPI::TEST):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@155541 268f45cc-cd09-0410-ab3c-d52691b4dbfc