Set the stage to remove the workaround for the SQLite BLOB corruption.  A few other small cleanups, and
        preparation for pruning unreferenced and unretained icons.

        * icon/IconDatabase.cpp:
        (WebCore::IconDatabase::recreateDatabase):  Added another trigger to assist in icon removal
        (WebCore::IconDatabase::deletePrivateTables):  Cleaned up logging messages
        (WebCore::IconDatabase::imageDataForIconID):  #ifdefed the blobbing hack for impending removal, use the real blob by default
        (WebCore::IconDatabase::imageDataForIconURL):  same
        (WebCore::IconDatabase::imageDataForPageURL):  same
        (WebCore::IconDatabase::pruneUnreferencedIcons):  Will delete any icons and their data that are not referenced
          by any PageURL
        * icon/IconDatabase.h:

        * icon/SQLDatabase.h:  Changed BlobAsVector to be unsigned char as thats the most reasonable type for
          a byte-buffer, and is what CFData expects
        * icon/SQLStatement.cpp:
        (WebCore::SQLStatement::getColumnBlobAsVector):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@15260 268f45cc-cd09-0410-ab3c-d52691b4dbfc