Create a single, unique pointer to sRGB color space

src/codec/SkPngCodec.cpp

Index: src/codec/SkPngCodec.cpp
diff --git a/src/codec/SkPngCodec.cpp b/src/codec/SkPngCodec.cpp
index b34c80c6ed8bd10e3928f84d7040b4d83b4b8a6d..4d863e43149cf65cd6dfaab0cc9dcc7a873b4a18 100644
--- a/src/codec/SkPngCodec.cpp
+++ b/src/codec/SkPngCodec.cpp
@@ -235,7 +235,7 @@ sk_sp<SkColorSpace> read_color_space(png_structp png_ptr, png_infop info_ptr) {
         }
 
 
-        return SkColorSpace::NewRGB(toXYZD50, std::move(gammas));
+        return SkColorSpace::NewRGB(std::move(gammas), toXYZD50);
     }
 
     // Last, check for gamma.
@@ -251,7 +251,7 @@ sk_sp<SkColorSpace> read_color_space(png_structp png_ptr, png_infop info_ptr) {
         float value = png_inverted_fixed_point_to_float(gamma);
         gammas = SkColorSpace::SkGammas(value, value, value);
 
-        return SkColorSpace::NewRGB(toXYZD50, std::move(gammas));
+        return SkColorSpace::NewRGB(std::move(gammas), toXYZD50);
     }
 
 #endif // LIBPNG >= 1.6