2013-03-07  Igor Oliveira  <igor.o@sisa.samsung.com>

        For our own sake, WebCL objects should create opencl objects internally.
        Issue #145

        Move WebCLSampler creation machinery from WebCLContext to WebCLSampler::create.
        Additionaly, fix WebCLSampler::getInfo method.

        Reviewed by Antonio Gomes.

        * Modules/webcl/WebCLContext.cpp:
        (WebCore::WebCLContext::createSampler):
        * Modules/webcl/WebCLSampler.cpp:
        (WebCore::WebCLSampler::create):
        (WebCore::WebCLSampler::WebCLSampler):
        (WebCore::WebCLSampler::getInfo):
        * Modules/webcl/WebCLSampler.h:
        (WebCLSampler):