Differentiate between sRGBGamma and 2Dot2Gamma

src/codec/SkPngCodec.cpp

Index: src/codec/SkPngCodec.cpp
diff --git a/src/codec/SkPngCodec.cpp b/src/codec/SkPngCodec.cpp
index 43d1580c176b0b0cfff9b3fda103fd6627f0b765..8829fc65d31362b13dc3098ce614e653d28614a3 100644
--- a/src/codec/SkPngCodec.cpp
+++ b/src/codec/SkPngCodec.cpp
@@ -8,7 +8,7 @@
 #include "SkBitmap.h"
 #include "SkCodecPriv.h"
 #include "SkColorPriv.h"
-#include "SkColorSpace.h"
+#include "SkColorSpace_Base.h"
 #include "SkColorTable.h"
 #include "SkMath.h"
 #include "SkOpts.h"
@@ -240,7 +240,7 @@ sk_sp<SkColorSpace> read_color_space(png_structp png_ptr, png_infop info_ptr) {
 
         SkMatrix44 mat(SkMatrix44::kUninitialized_Constructor);
         mat.set3x3ColMajorf(toXYZD50);
-        return SkColorSpace::NewRGB(gammas, mat);
+        return SkColorSpace_Base::NewRGB(gammas, mat);
     }
 
     // Last, check for gamma.
@@ -255,7 +255,7 @@ sk_sp<SkColorSpace> read_color_space(png_structp png_ptr, png_infop info_ptr) {
         gammas[1] = value;
         gammas[2] = value;
 
-        return SkColorSpace::NewRGB(gammas, SkMatrix44::I());
+        return SkColorSpace_Base::NewRGB(gammas, SkMatrix44::I());
     }
 
 #endif // LIBPNG >= 1.6