Make TextCodecICU not depend on TextEncoding
        https://bugs.webkit.org/show_bug.cgi?id=115848

        Reviewed by Darin Adler.

        * platform/text/TextCodecICU.cpp:
        (WebCore::TextCodecICU::create):
        (WebCore::TextCodecICU::TextCodecICU):
        (WebCore::TextCodecICU::createICUConverter):
        (WebCore::TextCodecICU::decode):
        (WebCore::TextCodecICU::encode):
        * platform/text/TextCodecICU.h:
        Use a plain encoding string in platform encoder wrapper, not a higher level concept.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149924 268f45cc-cd09-0410-ab3c-d52691b4dbfc