2014-05-07  Sharath Kamath  <s.kamath@samsung.com>

        Using nullptr at places where 0.

        Fixed #519

        Reviewed by Antonio.

        * Modules/webcl/WebCL.cpp:
        (WebCore::WebCL::createContext):
        * Modules/webcl/WebCLBuffer.cpp:
        (WebCore::WebCLBuffer::create):
        (WebCore::WebCLBuffer::createSubBuffer):
        * Modules/webcl/WebCLCommandQueue.cpp:
        (WebCore::WebCLCommandQueue::create):
        (WebCore::WebCLCommandQueue::computeEventFromWebCLEventIfApplicable):
        * Modules/webcl/WebCLContext.cpp:
        (WebCore::WebCLContext::create):
        (WebCore::WebCLContext::createCommandQueue):
        (WebCore::WebCLContext::createProgram):
        (WebCore::WebCLContext::createBufferBase):
        (WebCore::WebCLContext::createBuffer):
        (WebCore::WebCLContext::createImage2DBase):
        (WebCore::WebCLContext::createImage):
        (WebCore::WebCLContext::createSampler):
        (WebCore::WebCLContext::createUserEvent):
        (WebCore::WebCLContext::getGLContext):
        (WebCore::WebCLContext::createFromGLBuffer):
        (WebCore::WebCLContext::createFromGLRenderbuffer):
        (WebCore::WebCLContext::createFromGLTexture):
        * Modules/webcl/WebCLHTMLInterop.cpp:
        (WebCore::WebCLHTMLInterop::videoFrameToImage):
        (WebCore::WebCLHTMLInterop::LRUImageBufferCache::imageBuffer):
        * Modules/webcl/WebCLImage.cpp:
        (WebCore::WebCLImage::create):
        (WebCore::WebCLImage::getInfo):
        * Modules/webcl/WebCLKernel.cpp:
        (WebCore::WebCLKernel::create):
        (WebCore::WebCLKernel::getArgInfo):
        * Modules/webcl/WebCLMemoryInitializer.cpp:
        (WebCore::WebCLMemoryInitializer::validCommandQueueForMemoryInitialization):
        * Modules/webcl/WebCLMemoryObject.cpp:
        (WebCore::WebCLMemoryObject::getGLObjectInfo):
        * Modules/webcl/WebCLProgram.cpp:
        (WebCore::WebCLProgram::create):
        (WebCore::WebCLProgram::createKernel):
        * Modules/webcl/WebCLSampler.cpp:
        (WebCore::WebCLSampler::create):
        * Modules/webcl/WebCLUserEvent.cpp:
        (WebCore::WebCLUserEvent::create):