m_failIfMajorPerformanceCaveat 48 Source/core/html/canvas/WebGLContextAttributes.cpp , m_failIfMajorPerformanceCaveat(false) m_failIfMajorPerformanceCaveat 61 Source/core/html/canvas/WebGLContextAttributes.cpp , m_failIfMajorPerformanceCaveat(attrs.m_failIfMajorPerformanceCaveat)