Rewrite SkTRegistry to take any trivially-copyable type.

src/images/SkImageDecoder_libico.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 "SkColorPriv.h"
 #include "SkImageDecoder.h"
 #include "SkStream.h"
@@ skipping 380 matching lines @@
     stream->read((void*)buf, 4);
     int reserved = read2Bytes(buf, 0);
     int type = read2Bytes(buf, 2);
     if (reserved != 0 || type != 1) {
         // This stream does not represent an ICO image.
         return false;
     }
     return true;
 }
 
-#include "SkTRegistry.h"
-
 static SkImageDecoder* sk_libico_dfactory(SkStream* stream) {
     if (is_ico(stream)) {
         return SkNEW(SkICOImageDecoder);
     }
     return NULL;
 }
 
-static SkTRegistry<SkImageDecoder*, SkStream*> gReg(sk_libico_dfactory);
+static SkImageDecoder_DecodeReg gReg(sk_libico_dfactory);
 
 static SkImageDecoder::Format get_format_ico(SkStream* stream) {
     if (is_ico(stream)) {
         return SkImageDecoder::kICO_Format;
     }
     return SkImageDecoder::kUnknown_Format;
 }
 
-static SkTRegistry<SkImageDecoder::Format, SkStream*> gFormatReg(get_format_ico);
+static SkImageDecoder_FormatReg gFormatReg(get_format_ico);