Make code compile with clang_use_chrome_plugin (part II)

core/fxcodec/lgif/fx_gif.cpp

 // Copyright 2014 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
 
 #include "core/fxcodec/lgif/fx_gif.h"
 
 #include "core/fxcodec/lbmp/fx_bmp.h"
 
 void CGifLZWDecoder::Input(uint8_t* src_buf, uint32_t src_size) {
   next_in = src_buf;
   avail_in = src_size;
 }
+
 uint32_t CGifLZWDecoder::GetAvailInput() {
   return avail_in;
 }
+
+CGifLZWDecoder::CGifLZWDecoder(FX_CHAR* error_ptr)
+    : code_size(0),
+      code_size_cur(0),
+      code_clear(0),
+      code_end(0),
+      code_next(0),
+      code_first(0),
+      stack_size(0),
+      code_old(0),
+      next_in(nullptr),
+      avail_in(0),
+      bits_left(0),
+      code_store(0),
+      err_msg_ptr(error_ptr) {}
+
+CGifLZWDecoder::~CGifLZWDecoder() {}
+
 void CGifLZWDecoder::InitTable(uint8_t code_len) {
   code_size = code_len;
   code_clear = 1 << code_size;
   code_end = code_clear + 1;
   bits_left = 0;
   code_store = 0;
   next_in = nullptr;
   avail_in = 0;
   stack_size = 0;
   code_first = 0;
@@ skipping 1184 matching lines @@
     gif_ptr->cur_offset = cur_offset;
     res = FALSE;
   }
   dst_len = gif_ptr->cur_offset;
   dst_buf[dst_len - 1] = GIF_SIG_TRAILER;
   if (res) {
     gif_ptr->frames++;
   }
   return res;
 }