Make SkStream *not* ref counted.

dm/DMWriteTask.cpp

 #include "DMWriteTask.h"
 
 #include "DMJsonWriter.h"
 #include "DMUtil.h"
 #include "SkColorPriv.h"
 #include "SkCommonFlags.h"
 #include "SkData.h"
 #include "SkImageEncoder.h"
 #include "SkMD5.h"
 #include "SkMallocPixelRef.h"
@@ skipping 38 matching lines @@
 WriteTask::WriteTask(const Task& parent,
                      const char* sourceType,
                      SkStreamAsset *data,
                      const char* ext)
     : CpuTask(parent)
     , fBaseName(find_base_name(parent, &fSuffixes))
     , fSourceType(sourceType)
     , fData(data)
     , fExtension(ext) {
     SkASSERT(fData.get());
-    SkASSERT(fData->unique());
 }
 
 void WriteTask::makeDirOrFail(SkString dir) {
     // This can be a little racy, so if it fails check to see if someone else succeeded.
     if (!sk_mkdir(dir.c_str()) && !sk_isdir(dir.c_str())) {
         this->fail("Can't make directory.");
     }
 }
 
 static SkString get_md5_string(SkMD5* hasher) {
@@ skipping 110 matching lines @@
     }
     name.append(fBaseName.c_str());
     return name;
 }
 
 bool WriteTask::shouldSkip() const {
     return FLAGS_writePath.isEmpty();
 }
 
 }  // namespace DM