Fix for bugzilla bug 13187, place a hard limit on the amount of decoded data...

    Fix for bugzilla bug 13187, place a hard limit on the amount of decoded data that WebCore will keep
        around even on live pages (pages being displayed in tabs/windows or in the back/forward cache).
        Images will decode to paint and once the decoded data exceeds the cache size, the decoded data will be
        tossed.

        Refine the flushing algorithm to apply the two-pass decode/evict model to each LRU-SP queue individually, rather
        than to all the lists at once.  This allows the cache to evict large encoded resources before flushing small
        or frequently accessed decoded onces.

        Added information on live/decoded data to the cache statistics.

        Reviewed by darin

        * loader/Cache.cpp:
        (WebCore::Cache::Cache):
        (WebCore::Cache::pruneLiveResources):
        (WebCore::Cache::pruneAllResources):
        (WebCore::Cache::setMaximumSize):
        (WebCore::Cache::remove):
        (WebCore::Cache::lruListFor):
        (WebCore::Cache::removeFromLRUList):
        (WebCore::Cache::insertInLRUList):
        (WebCore::Cache::liveLRUListFor):
        (WebCore::Cache::removeFromLiveResourcesList):
        (WebCore::Cache::insertInLiveResourcesList):
        (WebCore::Cache::addToLiveResourcesSize):
        (WebCore::Cache::removeFromLiveResourcesSize):
        (WebCore::Cache::adjustSize):
        (WebCore::Cache::getStatistics):
        * loader/Cache.h:
        (WebCore::Cache::TypeStatistic::TypeStatistic):
        * loader/CachedImage.cpp:
        (WebCore::CachedImage::decodedSizeWillChange):
        (WebCore::CachedImage::decodedSizeChanged):
        * loader/CachedImage.h:
        * loader/CachedResource.cpp:
        (WebCore::CachedResource::CachedResource):
        (WebCore::CachedResource::ref):
        (WebCore::CachedResource::deref):
        (WebCore::CachedResource::setEncodedSize):
        (WebCore::CachedResource::liveResourceAccessed):
        * loader/CachedResource.h:
        (WebCore::CachedResource::liveAccessCount):
        (WebCore::CachedResource::resetLiveAccessCount):
        (WebCore::CachedResource::increaseLiveAccessCount):
        * platform/graphics/BitmapImage.cpp:
        (WebCore::BitmapImage::destroyDecodedData):
        (WebCore::BitmapImage::cacheFrame):
        * platform/graphics/ImageObserver.h:
        * rendering/RenderBox.cpp:
        (WebCore::RenderBox::paintBackgroundExtended):
        * rendering/RenderImage.cpp:
        (WebCore::RenderImage::paint):
        * rendering/RenderListMarker.cpp:
        (WebCore::RenderListMarker::paint):
        * rendering/RenderObject.cpp:
        (WebCore::RenderObject::paintBorderImage):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@20478 268f45cc-cd09-0410-ab3c-d52691b4dbfc