convertTexInternalFormat 3275 Source/core/html/canvas/WebGLRenderingContextBase.cpp     m_context->texImage2D(target, level, convertTexInternalFormat(internalformat, type), width, height, border, format, type, pixels);
convertTexInternalFormat  680 Source/core/html/canvas/WebGLRenderingContextBase.h     GLenum convertTexInternalFormat(GLenum internalformat, GLenum type);