Put close_gif() in an anonymous namespace.

src/images/SkImageDecoder_libgif.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColor.h"
 #include "SkColorPriv.h"
 #include "SkColorTable.h"
@@ skipping 211 matching lines @@
                     addr += rowBytes;
                 }
                 if (warning) {
                     gif_warning(*bm, "Index out of bounds.");
                 }
             }
         }
     }
 }
 
-int close_gif(GifFileType*);  // This function is a template argument, so can't be static.
+namespace {
+// This function is a template argument, so can't be static.
 int close_gif(GifFileType* gif) {
 #if GIFLIB_MAJOR < 5 || (GIFLIB_MAJOR == 5 && GIFLIB_MINOR == 0)
     return DGifCloseFile(gif);
 #else
     return DGifCloseFile(gif, NULL);
 #endif
 }
+}//namespace
 
 SkImageDecoder::Result SkGIFImageDecoder::onDecode(SkStream* sk_stream, SkBitmap* bm, Mode mode) {
 #if GIFLIB_MAJOR < 5
     GifFileType* gif = DGifOpen(sk_stream, DecodeCallBackProc);
 #else
     GifFileType* gif = DGifOpen(sk_stream, DecodeCallBackProc, NULL);
 #endif
     if (NULL == gif) {
         return error_return(*bm, "DGifOpen");
     }
@@ skipping 280 matching lines @@
 static SkImageDecoder_DecodeReg gReg(sk_libgif_dfactory);
 
 static SkImageDecoder::Format get_format_gif(SkStreamRewindable* stream) {
     if (is_gif(stream)) {
         return SkImageDecoder::kGIF_Format;
     }
     return SkImageDecoder::kUnknown_Format;
 }
 
 static SkImageDecoder_FormatReg gFormatReg(get_format_gif);