Add color gamut xform helpers to GrGLSLShaderBuilder

src/gpu/GrTextureParamsAdjuster.cpp

Index: src/gpu/GrTextureParamsAdjuster.cpp
diff --git a/src/gpu/GrTextureParamsAdjuster.cpp b/src/gpu/GrTextureParamsAdjuster.cpp
index 3ca90f5adb0a6e433743f9f2d9b406adb0021487..1586d73297ce7bfc2a74c7ad0091f9175bca2133 100644
--- a/src/gpu/GrTextureParamsAdjuster.cpp
+++ b/src/gpu/GrTextureParamsAdjuster.cpp
@@ -424,7 +424,8 @@ sk_sp<GrFragmentProcessor> GrTextureAdjuster::createFragmentProcessor(
              (domain.fLeft <= domain.fRight && domain.fTop <= domain.fBottom));
     textureMatrix.postIDiv(texture->width(), texture->height());
     sk_sp<GrColorSpaceXform> colorSpaceXform = GrColorSpaceXform::Make(this->getColorSpace(),
-                                                                       dstColorSpace);
+                                                                       dstColorSpace,
+                                                                       this->alphaType());
     return create_fp_for_domain_and_filter(texture, std::move(colorSpaceXform), textureMatrix,
                                            domainMode, domain, filterOrNullForBicubic);
 }
@@ -506,7 +507,8 @@ sk_sp<GrFragmentProcessor> GrTextureMaker::createFragmentProcessor(
     SkMatrix normalizedTextureMatrix = textureMatrix;
     normalizedTextureMatrix.postIDiv(texture->width(), texture->height());
     sk_sp<GrColorSpaceXform> colorSpaceXform = GrColorSpaceXform::Make(this->getColorSpace(),
-                                                                       dstColorSpace);
+                                                                       dstColorSpace,
+                                                                       this->alphaType());
     return create_fp_for_domain_and_filter(texture, std::move(colorSpaceXform),
                                            normalizedTextureMatrix, domainMode, domain,
                                            filterOrNullForBicubic);