[windows] Convert usage of GetDC to HWndDC Part 3.

[windows] Convert usage of GetDC to HWndDC Part 3.
https://bugs.webkit.org/show_bug.cgi?id=76889

Reviewed by Adam Roben.

Source/WebCore:

No new functionality so no new tests.

* platform/graphics/win/UniscribeController.cpp:
(WebCore::UniscribeController::shapeAndPlaceItem): Simple replacement.
(WebCore::UniscribeController::shape): Use the delayed allocation.
* platform/win/PopupMenuWin.cpp:
(WebCore::PopupMenuWin::paint): Fix a dc leak and use the dellayed allocation.

Source/WebKit2:

* UIProcess/win/WebPopupMenuProxyWin.cpp:
(WebKit::WebPopupMenuProxyWin::paint): Fix a dc leak and use the dellayed allocation.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105756 268f45cc-cd09-0410-ab3c-d52691b4dbfc