validateCapability 1695 Source/core/html/canvas/WebGLRenderingContextBase.cpp     if (isContextLost() || !validateCapability("disable", cap))
validateCapability 1822 Source/core/html/canvas/WebGLRenderingContextBase.cpp     if (isContextLost() || !validateCapability("enable", cap))
validateCapability 2889 Source/core/html/canvas/WebGLRenderingContextBase.cpp     if (isContextLost() || !validateCapability("isEnabled", cap))
validateCapability  809 Source/core/html/canvas/WebGLRenderingContextBase.h     bool validateCapability(const char* functionName, GLenum);