2013-04-12  Diego Pinheiro  <diego.qp@samsung.com>

        Add stress test for WebCLContext.

        Reviewed by Afonso Costa.

        * webcl/tests/webcl-stress-context-expected.txt: Added.
        * webcl/tests/webcl-stress-context.html: Added.
        * webcl/resources/webcl-test-utils.js: Changed.