Update woff2 to a15a8ab

third_party/woff2/src/woff2_enc.cc

Index: third_party/woff2/src/woff2_enc.cc
diff --git a/third_party/woff2/src/woff2_enc.cc b/third_party/woff2/src/woff2_enc.cc
index 48878b5f7e3100ca9973094f6e1623b67a12a38d..39e2ddc61d5a44e2c3962725d11b12314d396a04 100644
--- a/third_party/woff2/src/woff2_enc.cc
+++ b/third_party/woff2/src/woff2_enc.cc
@@ -272,20 +272,22 @@ bool ConvertTTFToWOFF2(const uint8_t *data, size_t length,
   std::vector<uint8_t> compression_buf(compression_buffer_size);
   uint32_t total_compressed_length = compression_buffer_size;
 
-  // Collect all transformed data into one place.
+  // Collect all transformed data into one place in output order.
   std::vector<uint8_t> transform_buf(total_transform_length);
   size_t transform_offset = 0;
   for (const auto& font : font_collection.fonts) {
-    for (const auto& i : font.tables) {
-      const Font::Table* table = font.FindTable(i.second.tag ^ 0x80808080);
-      if (i.second.IsReused()) continue;
-      if (i.second.tag & 0x80808080) continue;
+    for (const auto tag : font.OutputOrderedTags()) {
+      const Font::Table& original = font.tables.at(tag);
+      if (original.IsReused()) continue;
+      if (tag & 0x80808080) continue;
+      const Font::Table* table_to_store = font.FindTable(tag ^ 0x80808080);
+      if (table_to_store == NULL) table_to_store = &original;
 
-      if (table == NULL) table = &i.second;
-      StoreBytes(table->data, table->length,
+      StoreBytes(table_to_store->data, table_to_store->length,
                  &transform_offset, &transform_buf[0]);
     }
   }
+
   // Compress all transformed data in one stream.
   if (!Woff2Compress(transform_buf.data(), total_transform_length,
                      &compression_buf[0],