[BlackBerry] Add form navigation control state tracking.
https://bugs.webkit.org/show_bug.cgi?id=109300

Reviewed by Rob Buis.

Add form navigation control state tracking.

* Api/WebPage.cpp:
(BlackBerry::WebKit::WebPage::focusNextField):
(WebKit):
(BlackBerry::WebKit::WebPage::focusPreviousField):
(BlackBerry::WebKit::WebPage::submitForm):
* Api/WebPage.h:
* Api/WebPageClient.h:
* WebKitSupport/InputHandler.cpp:
(BlackBerry::WebKit::InputHandler::InputHandler):
(BlackBerry::WebKit::InputHandler::setElementUnfocused):
(BlackBerry::WebKit::InputHandler::updateFormState):
* WebKitSupport/InputHandler.h:
(InputHandler):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@142482 268f45cc-cd09-0410-ab3c-d52691b4dbfc