Remove image decoder and encoder autoregistration

src/images/SkImageDecoder_libico.h

Index: src/images/SkImageDecoder_libico.h
diff --git a/src/images/SkImageDecoder_libico.h b/src/images/SkImageDecoder_libico.h
new file mode 100644
index 0000000000000000000000000000000000000000..15bc1e29c66ba086cc62eb9b6f86e09d7e063745
--- /dev/null
+++ b/src/images/SkImageDecoder_libico.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkImageDecoder_libico_DEFINED
+#define SkImageDecoder_libico_DEFINED
+
+#include "SkImageDecoder.h"
+
+SkImageDecoder* SkCreateICOImageDecoder(SkImageDecoder::Format format);
+SkImageDecoder::Format SkDetectFormatICOImageDecoder(SkStreamRewindable* stream);
+
+#endif