XFA: Rename libpng to libpng16.

third_party/BUILD.gn

 # Copyright 2014 PDFium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("../pdfium.gni")
 
 group("third_party") {
   deps = [
     ":bigint",
     ":fx_freetype",
@@ skipping 260 matching lines @@
   ]
 }
 
 source_set("fx_lpng") {
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [
     "//build/config/compiler:no_chromium_code",
     "//third_party/pdfium:pdfium_config",
   ]
   sources = [
-    "libpng/png.c",
-    "libpng/png.h",
-    "libpng/pngconf.h",
-    "libpng/pngdebug.h",
-    "libpng/pngerror.c",
-    "libpng/pngget.c",
-    "libpng/pnginfo.h",
-    "libpng/pnglibconf.h",
-    "libpng/pngmem.c",
-    "libpng/pngpread.c",
-    "libpng/pngpriv.h",
-    "libpng/pngread.c",
-    "libpng/pngrio.c",
-    "libpng/pngrtran.c",
-    "libpng/pngrutil.c",
-    "libpng/pngset.c",
-    "libpng/pngstruct.h",
-    "libpng/pngtrans.c",
-    "libpng/pngwio.c",
-    "libpng/pngwrite.c",
-    "libpng/pngwtran.c",
-    "libpng/pngwutil.c",
+    "libpng16/png.c",
+    "libpng16/png.h",
+    "libpng16/pngconf.h",
+    "libpng16/pngdebug.h",
+    "libpng16/pngerror.c",
+    "libpng16/pngget.c",
+    "libpng16/pnginfo.h",
+    "libpng16/pnglibconf.h",
+    "libpng16/pngmem.c",
+    "libpng16/pngpread.c",
+    "libpng16/pngpriv.h",
+    "libpng16/pngread.c",
+    "libpng16/pngrio.c",
+    "libpng16/pngrtran.c",
+    "libpng16/pngrutil.c",
+    "libpng16/pngset.c",
+    "libpng16/pngstruct.h",
+    "libpng16/pngtrans.c",
+    "libpng16/pngwio.c",
+    "libpng16/pngwrite.c",
+    "libpng16/pngwtran.c",
+    "libpng16/pngwutil.c",
   ]
 }
 
 if (pdf_enable_xfa) {
   source_set("fx_tiff") {
     configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [
       "//build/config/compiler:no_chromium_code",
       "//third_party/pdfium:pdfium_config",
     ]
@@ skipping 74 matching lines @@
   sources = [
     "base/logging.h",
     "base/macros.h",
     "base/numerics/safe_conversions.h",
     "base/numerics/safe_conversions_impl.h",
     "base/numerics/safe_math.h",
     "base/numerics/safe_math_impl.h",
     "base/stl_util.h",
   ]
 }