Clean up fx_codec_tiff.cpp.

core/fxcodec/codec/ccodec_tiffmodule.h

 // Copyright 2016 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.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef CORE_FXCODEC_CODEC_CCODEC_TIFFMODULE_H_
 #define CORE_FXCODEC_CODEC_CCODEC_TIFFMODULE_H_
 
 #include "core/fxcrt/include/fx_system.h"
 
 class CCodec_TiffContext;
 class CFX_DIBAttribute;
 class CFX_DIBitmap;
 class IFX_FileRead;
 
 class CCodec_TiffModule {
  public:
   ~CCodec_TiffModule() {}
 
   CCodec_TiffContext* CreateDecoder(IFX_FileRead* file_ptr);
 
-  void GetFrames(CCodec_TiffContext* ctx, int32_t& frames);
-  FX_BOOL LoadFrameInfo(CCodec_TiffContext* ctx,
-                        int32_t frame,
-                        uint32_t& width,
-                        uint32_t& height,
-                        uint32_t& comps,
-                        uint32_t& bpc,
-                        CFX_DIBAttribute* pAttribute);
-  FX_BOOL Decode(CCodec_TiffContext* ctx, class CFX_DIBitmap* pDIBitmap);
+  bool LoadFrameInfo(CCodec_TiffContext* ctx,
+                     int32_t frame,
+                     int32_t* width,
+                     int32_t* height,
+                     int32_t* comps,
+                     int32_t* bpc,
+                     CFX_DIBAttribute* pAttribute);
+  bool Decode(CCodec_TiffContext* ctx, class CFX_DIBitmap* pDIBitmap);
   void DestroyDecoder(CCodec_TiffContext* ctx);
 };
 
 #endif  // CORE_FXCODEC_CODEC_CCODEC_TIFFMODULE_H_