Fix libfuzzer build broken at 9f7f7f8

testing/libfuzzer/xfa_codec_fuzzer.h

 // Copyright 2016 The 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.
 
 #ifndef TESTING_LIBFUZZER_XFA_CODEC_FUZZER_H_
 #define TESTING_LIBFUZZER_XFA_CODEC_FUZZER_H_
 
 #include <memory>
 
 #include "core/fxcodec/codec/ccodec_progressivedecoder.h"
@@ skipping 30 matching lines @@
   }
 
  private:
   class Reader : public IFX_SeekableReadStream {
    public:
     Reader(const uint8_t* data, size_t size) : m_data(data), m_size(size) {}
     ~Reader() {}
 
     void Release() override {}
 
-    FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override {
+    bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override {
       if (offset < 0 || offset >= m_size)
-        return FALSE;
+        return false;
       if (offset + size > m_size)
         size = m_size - offset;
       if (size == 0)
-        return FALSE;
+        return false;
 
       memcpy(buffer, m_data + offset, size);
-      return TRUE;
+      return true;
     }
 
     FX_FILESIZE GetSize() override { return static_cast<FX_FILESIZE>(m_size); }
 
    private:
     const uint8_t* const m_data;
     size_t m_size;
   };
 };
 
 #endif  // TESTING_LIBFUZZER_XFA_CODEC_FUZZER_H_