PixelsHaveAlpha 197 ui/gfx/icon_util.cc bool bitmap_has_alpha_channel = PixelsHaveAlpha( PixelsHaveAlpha 424 ui/gfx/icon_util.cc bool bitmap_has_alpha_channel = PixelsHaveAlpha( PixelsHaveAlpha 208 ui/gfx/icon_util.h static bool PixelsHaveAlpha(const uint32* pixels, size_t num_pixels);