Workaround to set the sRGB flag on SkImageGenerator

src/codec/SkJpegCodec.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 "SkCodec.h"
 #include "SkMSAN.h"
 #include "SkJpegCodec.h"
@@ skipping 313 matching lines @@
     fDecoderMgr.reset(decoderMgr);
     return true;
 }
 
 /*
  * Checks if the conversion between the input image and the requested output
  * image has been implemented
  * Sets the output color space
  */
 bool SkJpegCodec::setOutputColorSpace(const SkImageInfo& dst) {
-    const SkImageInfo& src = this->getInfo();
-
-    // Ensure that the profile type is unchanged
-    if (dst.profileType() != src.profileType()) {
-        return false;
-    }
-
     if (kUnknown_SkAlphaType == dst.alphaType()) {
         return false;
     }
 
     if (kOpaque_SkAlphaType != dst.alphaType()) {
         SkCodecPrintf("Warning: an opaque image should be decoded as opaque "
                       "- it is being decoded as non-opaque, which will draw slower\n");
     }
 
     // Check if we will decode to CMYK because a conversion to RGBA is not supported
@@ skipping 545 matching lines @@
 
         JDIMENSION linesRead = jpeg_read_raw_data(dinfo, yuv, numRowsPerBlock);
         if (linesRead < remainingRows) {
             // FIXME: Handle incomplete YUV decodes without signalling an error.
             return kInvalidInput;
         }
     }
 
     return kSuccess;
 }