Removed makeLinearGamma() from the public API for SkColorSpace

tests/CodecTest.cpp

Index: tests/CodecTest.cpp
diff --git a/tests/CodecTest.cpp b/tests/CodecTest.cpp
index bae8344bad631d5e6e4102ad561f2d911b455b03..4d18c618601a3dc7580f17dc9a0542d7cb68a5b2 100644
--- a/tests/CodecTest.cpp
+++ b/tests/CodecTest.cpp
@@ -10,6 +10,7 @@
 #include "SkBitmap.h"
 #include "SkCodec.h"
 #include "SkCodecImageGenerator.h"
+#include "SkColorSpace_Base.h"
 #include "SkData.h"
 #include "SkImageEncoder.h"
 #include "SkFrontBufferedStream.h"
@@ -1191,7 +1192,7 @@ static void test_conversion_possible(skiatest::Reporter* r, const char* path,
         REPORTER_ASSERT(r, SkCodec::kUnimplemented == result);
     }
 
-    infoF16 = infoF16.makeColorSpace(infoF16.colorSpace()->makeLinearGamma());
+    infoF16 = infoF16.makeColorSpace(as_CSB(infoF16.colorSpace())->makeLinearGamma());
     result = codec->getPixels(infoF16, bm.getPixels(), bm.rowBytes());
     REPORTER_ASSERT(r, SkCodec::kSuccess == result);
     result = codec->startScanlineDecode(infoF16);