[BlackBerry] Syncing up left over bits in Api from our local branch to upstream

https://bugs.webkit.org/show_bug.cgi?id=81105

Patch by Nima Ghanavatian <nghanavatian@rim.com> on 2012-03-16
Reviewed by Rob Buis.

This patches fixes up a previous sync done in this directory and adds some new bits
as well.  This is accurate as of ddea1528b37b29925638fe1183318b3c3994f1f8 in our
local repo.

* Api/BackingStore.cpp:
(BlackBerry::WebKit::BackingStorePrivate::drawAndBlendLayersForDirectRendering):
(WebKit):
(BlackBerry::WebKit::BackingStorePrivate::drawLayersOnCommitIfNeeded):
* Api/WebPage.cpp:
(BlackBerry::WebKit::WebPagePrivate::webContext):
(BlackBerry::WebKit::WebPage::webContext):
(BlackBerry::WebKit::WebPagePrivate::handleMouseEvent):
* Api/WebPage.h:
* Api/WebPage_p.h:
(WebPagePrivate):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@111024 268f45cc-cd09-0410-ab3c-d52691b4dbfc