respect srgb gamma when building mips

include/core/SkImageInfo.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImageInfo_DEFINED
 #define SkImageInfo_DEFINED
 
@@ skipping 267 matching lines @@
     }
 
     SkImageInfo makeAlphaType(SkAlphaType newAlphaType) const {
         return SkImageInfo(fWidth, fHeight, fColorType, newAlphaType, fProfileType, fColorSpace);
     }
     
     SkImageInfo makeColorType(SkColorType newColorType) const {
         return SkImageInfo(fWidth, fHeight, newColorType, fAlphaType, fProfileType, fColorSpace);
     }
 
+    SkImageInfo makeColorSpace(sk_sp<SkColorSpace> cs) const {
+        return SkImageInfo::Make(fWidth, fHeight, fColorType, fAlphaType, std::move(cs));
+    }
+
     int bytesPerPixel() const { return SkColorTypeBytesPerPixel(fColorType); }
 
     int shiftPerPixel() const { return SkColorTypeShiftPerPixel(fColorType); }
 
     uint64_t minRowBytes64() const {
         return sk_64_mul(fWidth, this->bytesPerPixel());
     }
 
     size_t minRowBytes() const {
         return (size_t)this->minRowBytes64();
@@ skipping 73 matching lines @@
 
 static inline bool SkColorAndProfileAreGammaCorrect(SkColorType ct, SkColorProfileType pt) {
     return kSRGB_SkColorProfileType == pt || kRGBA_F16_SkColorType == ct;
 }
 
 static inline bool SkImageInfoIsGammaCorrect(const SkImageInfo& info) {
     return SkColorAndProfileAreGammaCorrect(info.colorType(), info.profileType());
 }
 
 #endif