PrivilegedExtension  145 Source/core/html/canvas/WebGLRenderingContext.cpp     registerExtension<WebGLDebugShaders>(m_webglDebugShaders, PrivilegedExtension);
PrivilegedExtension  548 Source/core/html/canvas/WebGLRenderingContextBase.h             : m_privileged(flags & PrivilegedExtension)