Define CHROME_PNG_READ_iCCP_sRGB_cHRM_gAMA

third_party/libpng/png.h

Index: third_party/libpng/png.h
diff --git a/third_party/libpng/png.h b/third_party/libpng/png.h
index 29dc52b4dbea2a5c650ca08e4737bb0a2627ea79..be4456be2e1ccf150a7cdd1ea2bdeae0a270417c 100644
--- a/third_party/libpng/png.h
+++ b/third_party/libpng/png.h
@@ -850,6 +850,13 @@ typedef struct png_info_struct
     /* GR-P, 0.96a */
     /* Data valid if (valid & PNG_INFO_sRGB) non-zero. */
    png_byte srgb_intent PNG_DEPSTRUCT; /* sRGB rendering intent [0, 1, 2, or 3] */
+#ifdef CHROME_PNG_READ_iCCP_sRGB_cHRM_gAMA
+    /* Set if cHRM or gAMA chunks were also seen in the PNG headers when
+     * sRGB and iCCP read support are both enabled. Values contained are
+     * chunk info->valid flags, viz., PNG_INFO_cHRM | PNG_INFO_gAMA.
+     */
+   png_uint_32 chroma_or_gamma;
+#endif
 #endif
 
 #ifdef PNG_TEXT_SUPPORTED