2013-02-12  Sharath Kamath  <kamath.sharath@gmail.com>

        WebCLImage::getInfo needs to get the right informantion from OpenCL and return a valid object.
        Issue #106

        Reviewed by Antonio.

        Current implementation returns CL_IMAGE_FORMAT as channelOrder and CL_IMAGE_ELEMENT_SIZE as channelType.
        According to OpenCL specification CL_IMAGE_FORMAT will return a structure cl_image_format , consisting both channelOrder and channelType.
        Implimenting it to take this value and populate width, height and row_pitch into WebCLIImageDescriptor object.

        No new tests (OOPS!).

        * Modules/webcl/WebCLImage.cpp:
        (WebCore::WebCLImage::getInfo):