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

src/image/SkImage.cpp

Index: src/image/SkImage.cpp
diff --git a/src/image/SkImage.cpp b/src/image/SkImage.cpp
index 1c1b311b9381cda6966bf6ca2f3880655a45ef0e..88cf779081bf47ed4d10619904db6472c6a74d72 100644
--- a/src/image/SkImage.cpp
+++ b/src/image/SkImage.cpp
@@ -319,8 +319,8 @@ bool SkImage::asLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode mode) const {
 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;
     }