Fix SkImage::asLegacyBitmap() to respect color space info

src/image/SkImage.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkBitmapCache.h"
 #include "SkCanvas.h"
@@ skipping 301 matching lines @@
     return SkMakeImageFromRasterBitmap(bm);
 }
 
 bool SkImage::asLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode mode) const {
     return as_IB(this)->onAsLegacyBitmap(bitmap, mode);
 }
 
 bool SkImage_Base::onAsLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode mode) const {
     // As the base-class, all we can do is make a copy (regardless of mode).
     // Subclasses that want to be more optimal should override.
-    SkImageInfo info = SkImageInfo::MakeN32(this->width(), this->height(),
-                                    this->isOpaque() ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
+    SkImageInfo info = this->onImageInfo().makeColorType(kN32_SkColorType)
+            .makeAlphaType(this->isOpaque() ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
     if (!bitmap->tryAllocPixels(info)) {
         return false;
     }
     if (!this->readPixels(bitmap->info(), bitmap->getPixels(), bitmap->rowBytes(), 0, 0)) {
         bitmap->reset();
         return false;
     }
 
     if (kRO_LegacyBitmapMode == mode) {
         bitmap->setImmutable();
@@ skipping 163 matching lines @@
 SkImage* SkImage::NewFromDeferredTextureImageData(GrContext* ctx, const void* data,
                                                   SkBudgeted budgeted) {
     return MakeFromDeferredTextureImageData(ctx, data, budgeted).release();
 }
 #endif
 
 sk_sp<SkImage> MakeTextureFromMipMap(GrContext*, const SkImageInfo&, const GrMipLevel* texels,
                                      int mipLevelCount, SkBudgeted) {
     return nullptr;
 }