Reviewed by trey.  This change was actually made by trey.  It
        make the "Empty Cache" menu release the page cache.

        * AppController.m:
        (-[AppController confirmEmptyCache:]):

WebCore:
        Fixed 3116584.  Made letter-spacing, word-spacing, and text-decoration play
        well together.
        Reviewed by hyatt.

        Changes made with trey to enable to release of page cache from the
        "Empty Cache" menu item in Alex.
        Reviewed by trey.

        * khtml/rendering/font.cpp:
        (Font::drawLineForText):
        (Font::drawText):
        * khtml/rendering/font.h:
        * khtml/rendering/render_text.cpp:
        (TextSlave::paintDecoration):
        (RenderText::paintObject):
        * khtml/rendering/render_text.h:
        * kwq/KWQPainter.h:
        * kwq/KWQPainter.mm:
        (QPainter::drawLineForText):
        * kwq/WebCoreBridge.h:
        * kwq/WebCoreBridge.mm:
        (-[WebCoreBridge dealloc]):
        (-[WebCoreBridge openURL:reload:headers:lastModified:pageCache:]):
        (-[KWQPageState invalidate]):
        (-[KWQPageState dealloc]):
        * kwq/WebCoreTextRenderer.h:

WebKit:
        Changes to fix 3116584.
        Reviewed by hyatt.

        Changes to support emptying the page cache from the
        "Empty Cache" menu.
        Reviewed by trey.

        * ChangeLog:
        * History.subproj/WebBackForwardList.h:
        * History.subproj/WebBackForwardList.m:
        (-[WebBackForwardList clearPageCache]):
        * History.subproj/WebHistoryItem.m:
        (+[WebHistoryItem _scheduleReleaseTimer]):
        (-[WebHistoryItem _scheduleRelease]):
        (+[WebHistoryItem _releasePageCache:]):
        (-[WebHistoryItem setHasPageCache:]):
        * WebCoreSupport.subproj/WebTextRenderer.m:
        * WebView.subproj/WebFramePrivate.m:
        (-[WebFrame _opened]):

Tests:
        * html/letterspacing.html:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@3030 268f45cc-cd09-0410-ab3c-d52691b4dbfc