Change SkImageDecoders to take an SkStreamRewindable.

src/images/SkImageDecoder_wbmp.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 "SkImageDecoder.h"
@@ skipping 134 matching lines @@
         src += srcRB;
     }
 
     return true;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 DEFINE_DECODER_CREATOR(WBMPImageDecoder);
 ///////////////////////////////////////////////////////////////////////////////
 
-static SkImageDecoder* sk_wbmp_dfactory(SkStream* stream) {
+static SkImageDecoder* sk_wbmp_dfactory(SkStreamRewindable* stream) {
     wbmp_head   head;
 
     if (head.init(stream)) {
         return SkNEW(SkWBMPImageDecoder);
     }
     return NULL;
 }
 
-static SkImageDecoder::Format get_format_wbmp(SkStream* stream) {
+static SkImageDecoder::Format get_format_wbmp(SkStreamRewindable* stream) {
     wbmp_head head;
     if (head.init(stream)) {
         return SkImageDecoder::kWBMP_Format;
     }
     return SkImageDecoder::kUnknown_Format;
 }
 
 static SkImageDecoder_DecodeReg gDReg(sk_wbmp_dfactory);
 static SkImageDecoder_FormatReg gFormatReg(get_format_wbmp);