OESStandardDerivatives   32 Source/core/html/canvas/OESStandardDerivatives.cpp OESStandardDerivatives::OESStandardDerivatives(WebGLRenderingContextBase* context)
OESStandardDerivatives   39 Source/core/html/canvas/OESStandardDerivatives.cpp OESStandardDerivatives::~OESStandardDerivatives()