New GM that exercises gamma-correctness in various parts of the pipeline.

src/core/SkBlitter_Sprite.cpp

Index: src/core/SkBlitter_Sprite.cpp
diff --git a/src/core/SkBlitter_Sprite.cpp b/src/core/SkBlitter_Sprite.cpp
index 27cbd61768ed6db20aad874e0cbb570d1c449a19..754703cf75a745f20b1faa42a68de7faa8b6f7d4 100644
--- a/src/core/SkBlitter_Sprite.cpp
+++ b/src/core/SkBlitter_Sprite.cpp
@@ -60,10 +60,11 @@ SkBlitter* SkBlitter::ChooseSprite(const SkPixmap& dst, const SkPaint& paint,
             blitter = SkSpriteBlitter::ChooseD16(source, paint, allocator);
             break;
         case kN32_SkColorType:
-            if (dst.info().isSRGB()) {
-                blitter = SkSpriteBlitter::ChooseS32(source, paint, allocator);
+            if (dst.info().isSRGB() || source.info().isSRGB()) {
+                blitter = SkSpriteBlitter::ChooseNew32(source, paint, allocator,
+                                                       dst.info().profileType());
             } else {
-                blitter = SkSpriteBlitter::ChooseL32(source, paint, allocator);
+                blitter = SkSpriteBlitter::ChooseLegacy32(source, paint, allocator);
             }
             break;
         case kRGBA_F16_SkColorType: