Add support for 3D colorLUTs to SkColorXform

dm/DMSrcSink.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "DMSrcSink.h"
 #include "Resources.h"
 #include "SkAndroidCodec.h"
@@ skipping 878 matching lines @@
         case kDst_sRGB_Mode:
         case kDst_HPZR30w_Mode: {
             sk_sp<SkColorSpace> srcSpace = sk_ref_sp(codec->getColorSpace());
             sk_sp<SkColorSpace> dstSpace = (kDst_sRGB_Mode == fMode) ?
                     SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named) :
                     SkColorSpace::NewICC(dstData->data(), dstData->size());
             SkASSERT(dstSpace);
 
             std::unique_ptr<SkColorSpaceXform> xform = SkColorSpaceXform::New(srcSpace, dstSpace);
             if (!xform) {
-                // FIXME (msarett):
-                // I haven't implemented conversions for all of the images that I've uploaded for
-                // testing.  Once we support all of them, this should be a fatal error.
-                return Error::Nonfatal("Unimplemented color conversion.");
+                return "Unimplemented color conversion.";
             }
 
             uint32_t* row = (uint32_t*) bitmap.getPixels();
             for (int y = 0; y < info.height(); y++) {
                 xform->xform_RGB1_8888(row, row, info.width());
                 row = SkTAddOffset<uint32_t>(row, bitmap.rowBytes());
             }
 
             canvas->drawBitmap(bitmap, 0, 0);
             break;
@@ skipping 633 matching lines @@
             skr.visit(i, drawsAsSingletonPictures);
         }
         sk_sp<SkPicture> macroPic(macroRec.finishRecordingAsPicture());
 
         canvas->drawPicture(macroPic);
         return check_against_reference(bitmap, src, fSink);
     });
 }
 
 }  // namespace DM