Create SkColorSpaceXform to handle color conversions

include/codec/SkCodec.h

Index: include/codec/SkCodec.h
diff --git a/include/codec/SkCodec.h b/include/codec/SkCodec.h
index 50875e46c4a42cfbef1d204a0af3bfa01a74b38c..b6ea02ac37704fa8a1704f980dc9a48c3d805839 100644
--- a/include/codec/SkCodec.h
+++ b/include/codec/SkCodec.h
@@ -23,6 +23,10 @@ class SkData;
 class SkPngChunkReader;
 class SkSampler;
 
+namespace DM {
+class ColorCodecSrc;
+}
+
 /**
  *  Abstraction layer directly on top of an image codec.
  */
@@ -646,6 +650,10 @@ protected:
 
     virtual int onOutputScanline(int inputScanline) const;
 
+    /**
+     *  Used for testing with qcms.

[scroggo, 2016/05/31 21:13:34]

I think you said this was temporary? Should there be a FIXME?

[msarett, 2016/05/31 22:02:19]

Yes I think so.

+     */
+    virtual sk_sp<SkData> getICCData() const { return nullptr; }
 private:
     const SkEncodedInfo         fEncodedInfo;
     const SkImageInfo           fSrcInfo;
@@ -709,6 +717,7 @@ private:
      */
     virtual SkSampler* getSampler(bool /*createIfNecessary*/) { return nullptr; }
 
+    friend class DM::ColorCodecSrc; // For testing with qcms
     friend class SkSampledCodec;
     friend class SkIcoCodec;
 };