Update woff2 to 4e698b8

third_party/woff2/src/woff2_common.h

 // Copyright 2014 Google Inc. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 // http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //
 // Common definition for WOFF2 encoding/decoding
 
 #ifndef WOFF2_WOFF2_COMMON_H_
 #define WOFF2_WOFF2_COMMON_H_
 
 #include <stddef.h>
 #include <inttypes.h>
 
 #include <string>
 
 namespace woff2 {
 
 static const uint32_t kWoff2Signature = 0x774f4632;  // "wOF2"
 
-const unsigned int kWoff2FlagsTransform = 1 << 5;
+// Leave the first byte open to store flag_byte
+const unsigned int kWoff2FlagsTransform = 1 << 8;
 
 // TrueType Collection ID string: 'ttcf'
 static const uint32_t kTtcFontFlavor = 0x74746366;
 
 static const size_t kSfntHeaderSize = 12;
 static const size_t kSfntEntrySize = 16;
 
 struct Point {
   int x;
   int y;
@@ skipping 22 matching lines @@
 // collection. Ref http://www.microsoft.com/typography/otspec/otff.htm,
 // True Type Collections
 size_t CollectionHeaderSize(uint32_t header_version, uint32_t num_fonts);
 
 // Compute checksum over size bytes of buf
 uint32_t ComputeULongSum(const uint8_t* buf, size_t size);
 
 } // namespace woff2
 
 #endif  // WOFF2_WOFF2_COMMON_H_