https://bugs.webkit.org/show_bug.cgi?id=72150

Reviewed by Dimitri Glazkov.

Tests require mocking (similar to geolocation) that will be built after this.

* WebCore.gypi:
* bindings/generic/RuntimeEnabledFeatures.h:
(WebCore::RuntimeEnabledFeatures::webkitPointerEnabled):
* page/MouseLockable.cpp: Added.
(WebCore::MouseLockable::MouseLockable):
(WebCore::MouseLockable::~MouseLockable):
(WebCore::MouseLockable::webkitLock):
(WebCore::MouseLockable::webkitUnlock):
(WebCore::MouseLockable::webkitIsLocked):
* page/MouseLockable.h: Added.
(WebCore::MouseLockable::create):
* page/MouseLockable.idl: Added.
* page/Navigator.cpp:
(WebCore::Navigator::webkitPointer):
* page/Navigator.h:
* page/Navigator.idl:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@99994 268f45cc-cd09-0410-ab3c-d52691b4dbfc