[BlackBerry] Limit session storage quota to 5MB by default

[BlackBerry] Limit session storage quota to 5MB by default
https://bugs.webkit.org/show_bug.cgi?id=89941

Patch by Jonathan Dong <jonathan.dong@torchmobile.com.cn> on 2012-06-26
Reviewed by Rob Buis.

Limit session storage quota to 5MB by default for BlackBerry
porting.
Internally reviewed by George Staikos.

* Api/WebPage.cpp:
(BlackBerry::WebKit::WebPagePrivate::didChangeSettings):
* Api/WebSettings.cpp:
(WebKit):
(BlackBerry::WebKit::WebSettings::standardSettings):
(BlackBerry::WebKit::WebSettings::sessionStorageQuota):
(BlackBerry::WebKit::WebSettings::setSessionStorageQuota):
* Api/WebSettings.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121255 268f45cc-cd09-0410-ab3c-d52691b4dbfc