2013-01-10  Antonio Gomes  <a1.gomes@sisa.samsung.com>

        ComputeContext should not know of OpenCL
        Issue #30

        Reviewed by Igor.

        Patch aims to leave ComputeContext.h an open header for all OpenCL implementations,
        and move the existing ComputeContext.cpp file to opencl/ComputeContextCL.cpp, where
        it is clear that it "speaks cl".

        Due to their GPU process archtecture, Chromium might need a different structure
        (as for WebGL).

        * WebCore.xcodeproj/project.pbxproj:
        * platform/opencl/ComputeContextCL.cpp: Renamed from Source/WebCore/platform/ComputeContext.cpp.