validateDrawMode 5164 Source/core/html/canvas/WebGLRenderingContextBase.cpp     if (isContextLost() || !validateDrawMode(functionName, mode))
validateDrawMode 5195 Source/core/html/canvas/WebGLRenderingContextBase.cpp     if (isContextLost() || !validateDrawMode(functionName, mode))
validateDrawMode  780 Source/core/html/canvas/WebGLRenderingContextBase.h     bool validateDrawMode(const char* functionName, GLenum);