pi_ 288 tools/imagediff/image_diff_png.cc png_destroy_read_struct(ps_, pi_, NULL); pi_ 292 tools/imagediff/image_diff_png.cc png_info** pi_; pi_ 327 ui/gfx/codec/png_codec.cc png_destroy_read_struct(ps_, pi_, NULL); pi_ 331 ui/gfx/codec/png_codec.cc png_info** pi_; pi_ 342 ui/gfx/codec/png_codec.cc png_destroy_write_struct(ps_, pi_); pi_ 345 ui/gfx/codec/png_codec.cc pi_ = pi; pi_ 349 ui/gfx/codec/png_codec.cc png_info** pi_;