xfermodeIsOpaque  294 Source/platform/graphics/skia/OpaqueRegionSkia.cpp     bool xfersOpaque = xfermodeIsOpaque(paint, drawsOpaque);
xfermodeIsOpaque  338 Source/platform/graphics/skia/OpaqueRegionSkia.cpp     bool sourceOpaqueRectXfersOpaque = xfermodeIsOpaque(paint, sourceOpaqueRectDrawsOpaque);