Added an accessor to a SQLite config option to change its disk-syncing behavior.
        Used this accessor to significantly speed up writes to the Icon DB.

        * icon/IconDatabase.cpp:
        (WebCore::IconDatabase::open):  Disable full syncing to the SQLite db to speed up writes to the icondb

        * icon/SQLDatabase.cpp:
        (SQLDatabase::setFullsync):
        (SQLDatabase::setSynchronous):
        * icon/SQLDatabase.h:
        (WebCore::SQLDatabase::):  Added accessor to the SQLite config pragma "synchronous"



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@15221 268f45cc-cd09-0410-ab3c-d52691b4dbfc