Fixed 3127225.  Provide new SPI to get available system memory.
        (Also currently unused SPI to get number of processors.)

        Reviewed by gramps.

        * Misc.subproj/WebSystemBits.h:
        * Misc.subproj/WebSystemBits.m:
        (initCapabilities):
        (WebSystemMainMemory):
        (WebSystemProcessors):
        * WebFoundation.exp:
        * WebFoundation.pbproj/project.pbxproj:

WebCore:
        Fixed 3127225.  Set WebCore object cache size when first bridge is created.

        Reviewed by gramps.

        * kwq/WebCoreBridge.h:
        * kwq/WebCoreBridge.mm:
        (-[WebCoreBridge init]):

WebKit:
        Fixed 3127225.  Scale page cache based on available memory.
        Also added support for setting WebCore object cache size via
        a preference.
        Fixed 3126267.  Increase CG glyph cache size if font smoothing
        is turned on.

        Reviewed by gramps.

        * History.subproj/WebBackForwardList.m:
        (+[WebBackForwardList pageCacheSize]):
        * Misc.subproj/WebKitLogging.h:
        * Misc.subproj/WebKitLogging.m:
        * WebCoreSupport.subproj/WebBridge.m:
        (-[WebBridge getObjectCacheSize]):
        * WebCoreSupport.subproj/WebTextRendererFactory.m:
        (getAppDefaultValue):
        (getUserDefaultValue):
        (getLCDScaleParameters):
        * WebView.subproj/WebPreferences.m:
        (+[WebPreferences load]):
        (-[WebPreferences _pageCacheSize]):
        (-[WebPreferences _objectCacheSize]):
        * WebView.subproj/WebPreferencesPrivate.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@3036 268f45cc-cd09-0410-ab3c-d52691b4dbfc