2013-02-26  Sharath Kamath  <kamath.sharath@gmail.com>

        Route WebCLSampler::getSamplerInfo() and releaseSampler()
        through ComputeContext.

        Issue #136.

        Reviewed by Antonio.

        Route opencl API clGetSamplerInfo() and clReleaseSampler()
        call via ComputeContext interface.

        No new tests.

        * Modules/webcl/WebCLSampler.cpp:
        (WebCore::WebCLSampler::~WebCLSampler):
        (WebCore::WebCLSampler::getInfo):
        * platform/ComputeContext.h:
        * platform/opencl/ComputeContextCL.cpp:
        (WebCore::ComputeContext::getSamplerInfo):
        (WebCore):
        (WebCore::ComputeContext::releaseSampler):