Remove SkEncodedInfo kUnknown_Color and kUnknown_Alpha from public API

src/codec/SkRawCodec.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCodec.h"
 #include "SkCodecPriv.h"
 #include "SkColorPriv.h"
@@ skipping 538 matching lines @@
         if (!is_valid_endian_marker(header, &littleEndian)) {
             return false;
         }
 
         return 0x2A == get_endian_short(header + 2, littleEndian);
     }
 
     void init(int width, int height, const dng_point& cfaPatternSize) {
         fWidth = width;
         fHeight = height;
-        fEncodedInfo = SkEncodedInfo::Make(SkEncodedInfo::kRGB_Color,
-                SkEncodedInfo::kOpaque_Alpha, 8);
 
         // The DNG SDK scales only during demosaicing, so scaling is only possible when
         // a mosaic info is available.
         fIsScalable = cfaPatternSize.v != 0 && cfaPatternSize.h != 0;
         fIsXtransImage = fIsScalable ? (cfaPatternSize.v == 6 && cfaPatternSize.h == 6) : false;
     }
 
     bool initFromPiex() {
         // Does not take the ownership of rawStream.
         SkPiexStream piexStream(fStream.get());
@@ skipping 40 matching lines @@
             this->init(static_cast<int>(fNegative->DefaultCropSizeH().As_real64()),
                        static_cast<int>(fNegative->DefaultCropSizeV().As_real64()),
                        cfaPatternSize);
             return true;
         } catch (...) {
             return false;
         }
     }
 
     SkDngImage(SkRawStream* stream)
-        : fStream(stream) {}
+        : fStream(stream)
+        , fEncodedInfo(SkEncodedInfo::Make(SkEncodedInfo::kRGB_Color,
+                                           SkEncodedInfo::kOpaque_Alpha, 8))
+    {}
 
     SkDngMemoryAllocator fAllocator;
     SkAutoTDelete<SkRawStream> fStream;
     SkAutoTDelete<dng_host> fHost;
     SkAutoTDelete<dng_info> fInfo;
     SkAutoTDelete<dng_negative> fNegative;
     SkAutoTDelete<dng_stream> fDngStream;
 
     int fWidth;
     int fHeight;
@@ skipping 140 matching lines @@
     SkISize sizeFloor = this->onGetScaledDimensions(1.f / std::floor(fullShortEdge / shortEdge));
     SkISize sizeCeil = this->onGetScaledDimensions(1.f / std::ceil(fullShortEdge / shortEdge));
     return sizeFloor == dim || sizeCeil == dim;
 }
 
 SkRawCodec::~SkRawCodec() {}
 
 SkRawCodec::SkRawCodec(SkDngImage* dngImage)
     : INHERITED(dngImage->width(), dngImage->height(), dngImage->getEncodedInfo(), nullptr)
     , fDngImage(dngImage) {}