Rename the kRAW_SkEncodedFormat to kDNG_SkEncodedFormat as it is actually only used for DNG for…

src/codec/SkRawCodec.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkRawCodec_DEFINED
 #define SkRawCodec_DEFINED
 
@@ skipping 20 matching lines @@
     static SkCodec* NewFromStream(SkStream*);
 
     ~SkRawCodec() override;
 
 protected:
 
     Result onGetPixels(const SkImageInfo& dstInfo, void* dst, size_t dstRowBytes, const Options&,
             SkPMColor*, int*, int*) override;
 
     SkEncodedFormat onGetEncodedFormat() const override {
-        return kRAW_SkEncodedFormat;
+        return kDNG_SkEncodedFormat;
     }
 
     SkISize onGetScaledDimensions(float desiredScale) const override;
 
     bool onDimensionsSupported(const SkISize&) override;
 
 private:
 
     /*
      * Creates an instance of the decoder
      * Called only by NewFromStream, takes ownership of dngImage.
      */
     SkRawCodec(SkDngImage* dngImage);
 
     SkAutoTDelete<SkDngImage> fDngImage;
 
     typedef SkCodec INHERITED;
 };
 
 #endif