[BlackBerry] Use PUBLIC_BUILD to enable/disable DRT

[BlackBerry] Use PUBLIC_BUILD to enable/disable DRT
https://bugs.webkit.org/show_bug.cgi?id=90271

Patch by Xiaobo Wang <xbwang@torchmobile.com.cn> on 2012-07-02
Reviewed by George Staikos.

RIM PR #154707

Currently DRT code will be compiled only if ENABLE_DRT is set, and it's not
defined by default.
We should enable DRT by default unless PUBLIC_BUILD is set. In this way we don't
need to rebuild webkit before running DRT.

.:

* Source/cmake/OptionsBlackBerry.cmake:
* Source/cmakeconfig.h.cmake:

Source/WebKit:

* PlatformBlackBerry.cmake:

Source/WebKit/blackberry:

* Api/WebPage.cpp:
(BlackBerry::WebKit::WebPagePrivate::~WebPagePrivate):
(BlackBerry::WebKit::WebPagePrivate::init):
(BlackBerry::WebKit::WebPagePrivate::authenticationChallenge):
(BlackBerry::WebKit::WebPage::runLayoutTests):
* WebCoreSupport/ChromeClientBlackBerry.cpp:
(WebCore::ChromeClientBlackBerry::addMessageToConsole):
(WebCore::ChromeClientBlackBerry::runJavaScriptAlert):
(WebCore::ChromeClientBlackBerry::runJavaScriptConfirm):
(WebCore::ChromeClientBlackBerry::runJavaScriptPrompt):
(WebCore::ChromeClientBlackBerry::createWindow):
(WebCore::ChromeClientBlackBerry::runBeforeUnloadConfirmPanel):
(WebCore::ChromeClientBlackBerry::setStatusbarText):
(WebCore::ChromeClientBlackBerry::exceededDatabaseQuota):
(WebCore::ChromeClientBlackBerry::keyboardUIMode):

Tools:

* Scripts/webkitdirs.pm:
(blackberryCMakeArguments):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121725 268f45cc-cd09-0410-ab3c-d52691b4dbfc