Use MachSendRight in WebKit2

Use MachSendRight in WebKit2
https://bugs.webkit.org/show_bug.cgi?id=139800

Reviewed by Tim Horton.

Source/WebCore:

* WebCore.exp.in:
* platform/cocoa/MachSendRight.h:
(WebCore::MachSendRight::MachSendRight):
(WebCore::MachSendRight::sendRight):
* platform/graphics/cocoa/IOSurface.h:
* platform/graphics/cocoa/IOSurface.mm:
(IOSurface::createFromSendRight):
(IOSurface::createFromMachPort): Deleted.

Source/WebKit2:

* Platform/IPC/ArgumentEncoder.h:
(IPC::ArgumentEncoder::encode):
(IPC::ArgumentEncoder::operator<<):
* Shared/WebCoreArgumentCoders.h:
* Shared/mac/RemoteLayerBackingStore.mm:
(WebKit::RemoteLayerBackingStore::encode):
(WebKit::RemoteLayerBackingStore::decode):
* Shared/mac/WebCoreArgumentCodersMac.mm:
(IPC::ArgumentCoder<MachSendRight>::encode):
(IPC::ArgumentCoder<MachSendRight>::decode):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@177543 268f45cc-cd09-0410-ab3c-d52691b4dbfc