2014-06-02  Shilpa Shri  <shilpa.shri@samsung.com>

        Support WebCLCommandQueue::enqueueWriteImage for the extn WEBCL_html_video

        Issue #524

        Reviewed by Antonio & Sharath.

        Conformance test:
        conformance/extension/WEBCL_html_video/cl_commandQueue_enqueueWriteImage_with_HTMLVideoElement.html

        * Modules/webcl/WebCLCommandQueue.cpp:
        (WebCore::WebCLCommandQueue::enqueueWriteImage):
        * Modules/webcl/WebCLCommandQueue.h:
        * Modules/webcl/WebCLCommandQueue.idl:
        * Modules/webcl/WebCLContext.h:
        (WebCore::WebCLContext::getInteropObject):