Update FLAC to 1.3.1

BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 config("flac_config") {
   defines = [
     "FLAC__NO_DLL",
   ]
 }
 
@@ skipping 16 matching lines @@
     "include/FLAC/all.h",
     "include/FLAC/assert.h",
     "include/FLAC/callback.h",
     "include/FLAC/export.h",
     "include/FLAC/format.h",
     "include/FLAC/metadata.h",
     "include/FLAC/ordinals.h",
     "include/FLAC/stream_decoder.h",
     "include/FLAC/stream_encoder.h",
     "include/share/alloc.h",
+    "include/share/compat.h",
+    "include/share/endswap.h",
+    "include/share/private.h",
     "src/libFLAC/alloc.c",
     "src/libFLAC/bitmath.c",
     "src/libFLAC/bitreader.c",
     "src/libFLAC/bitwriter.c",
     "src/libFLAC/cpu.c",
     "src/libFLAC/crc.c",
     "src/libFLAC/fixed.c",
     "src/libFLAC/float.c",
     "src/libFLAC/format.c",
     "src/libFLAC/lpc.c",
     "src/libFLAC/md5.c",
     "src/libFLAC/memory.c",
     "src/libFLAC/stream_decoder.c",
     "src/libFLAC/stream_encoder.c",
     "src/libFLAC/stream_encoder_framing.c",
     "src/libFLAC/window.c",
     "src/libFLAC/include/private/all.h",
     "src/libFLAC/include/private/bitmath.h",
     "src/libFLAC/include/private/bitreader.h",
     "src/libFLAC/include/private/bitwriter.h",
     "src/libFLAC/include/private/cpu.h",
     "src/libFLAC/include/private/crc.h",
     "src/libFLAC/include/private/fixed.h",
     "src/libFLAC/include/private/float.h",
     "src/libFLAC/include/private/format.h",
     "src/libFLAC/include/private/lpc.h",
+    "src/libFLAC/include/private/macros.h",
     "src/libFLAC/include/private/md5.h",
     "src/libFLAC/include/private/memory.h",
     "src/libFLAC/include/private/metadata.h",
+    "src/libFLAC/include/private/stream_encoder.h",
     "src/libFLAC/include/private/stream_encoder_framing.h",
     "src/libFLAC/include/private/window.h",
     "src/libFLAC/include/protected/all.h",
     "src/libFLAC/include/protected/stream_decoder.h",
     "src/libFLAC/include/protected/stream_encoder.h",
   ]
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [
     ":flac_config",
     ":flac_private_config",
     "//build/config/compiler:no_chromium_code",
   ]
   public_configs = [ ":flac_config" ]
 
   include_dirs = [
     "include",
     "src/libFLAC/include",
   ]
 
   defines = [
     "FLAC__OVERFLOW_DETECT",
-    "VERSION=\"1.2.1\"",
+    "VERSION=\"1.3.1\"",
+    "HAVE_LROUND",
   ]
+
+  if (is_win) {
+    sources += [
+      "include/share/win_utf8_io.h",
+      "src/share/win_utf8_io/win_utf8_io.c",
+    ]
+    # win_utf8_io.c defines this itself.
+    configs -= [ "//build/config/win:lean_and_mean" ]
+    cflags = [
+      "/wd4334",  # 32-bit shift converted to 64 bits.
+      "/wd4267"   # Converting from size_t to unsigned on 64-bit.
+    ]
+  } else {
+    defines += [
+      "HAVE_INTTYPES_H",
+    ]
+  }
 }