SkStream: Add SkDynamicMemoryWStream::writeToStream(SkWStream*)

include/core/SkStream.h

 /*
  * 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.
  */
 
 #ifndef SkStream_DEFINED
 #define SkStream_DEFINED
 
@@ skipping 377 matching lines @@
     bool write(const void* buffer, size_t size) SK_OVERRIDE;
     size_t bytesWritten() const SK_OVERRIDE { return fBytesWritten; }
     // random access write
     // modifies stream and returns true if offset + size is less than or equal to getOffset()
     bool write(const void* buffer, size_t offset, size_t size);
     bool read(void* buffer, size_t offset, size_t size);
     size_t getOffset() const { return fBytesWritten; }
 
     // copy what has been written to the stream into dst
     void copyTo(void* dst) const;
+    void writeToStream(SkWStream* dst) const;
 
     /**
      *  Return a copy of the data written so far. This call is responsible for
      *  calling unref() when they are finished with the data.
      */
     SkData* copyToData() const;
 
     /** Reset, returning a reader stream with the current content. */
     SkStreamAsset* detachAsStream();
 
@@ skipping 29 matching lines @@
 
 private:
     size_t fBytesWritten;
     typedef SkWStream INHERITED;
 };
 
 // for now
 typedef SkFILEStream SkURLStream;
 
 #endif