Introduce GrColorSpaceXform, for gamut conversion on textures

src/gpu/GrTextureAccess.cpp

Index: src/gpu/GrTextureAccess.cpp
diff --git a/src/gpu/GrTextureAccess.cpp b/src/gpu/GrTextureAccess.cpp
index 675bc207777b404e2682e91a5519899009560b7d..a70b5b05595dcce7bdfc1055d5cecdfe670520a3 100644
--- a/src/gpu/GrTextureAccess.cpp
+++ b/src/gpu/GrTextureAccess.cpp
@@ -11,27 +11,33 @@
 
 GrTextureAccess::GrTextureAccess() {}
 
-GrTextureAccess::GrTextureAccess(GrTexture* texture, const GrTextureParams& params) {
-    this->reset(texture, params);
+GrTextureAccess::GrTextureAccess(GrTexture* texture,
+                                 sk_sp<GrColorSpaceXform> colorSpaceXform,
+                                 const GrTextureParams& params) {
+    this->reset(texture, std::move(colorSpaceXform), params);
 }
 
 GrTextureAccess::GrTextureAccess(GrTexture* texture,
+                                 sk_sp<GrColorSpaceXform> colorSpaceXform,
                                  GrTextureParams::FilterMode filterMode,
                                  SkShader::TileMode tileXAndY,
                                  GrShaderFlags visibility) {
-    this->reset(texture, filterMode, tileXAndY, visibility);
+    this->reset(texture, std::move(colorSpaceXform), filterMode, tileXAndY, visibility);
 }
 
 void GrTextureAccess::reset(GrTexture* texture,
+                            sk_sp<GrColorSpaceXform> colorSpaceXform,
                             const GrTextureParams& params,
                             GrShaderFlags visibility) {
     SkASSERT(texture);
     fTexture.set(SkRef(texture), kRead_GrIOType);
     fParams = params;
     fVisibility = visibility;
+    fColorSpaceXform = std::move(colorSpaceXform);
 }
 
 void GrTextureAccess::reset(GrTexture* texture,
+                            sk_sp<GrColorSpaceXform> colorSpaceXform,
                             GrTextureParams::FilterMode filterMode,
                             SkShader::TileMode tileXAndY,
                             GrShaderFlags visibility) {
@@ -39,4 +45,5 @@ void GrTextureAccess::reset(GrTexture* texture,
     fTexture.set(SkRef(texture), kRead_GrIOType);
     fParams.reset(tileXAndY, filterMode);
     fVisibility = visibility;
+    fColorSpaceXform = std::move(colorSpaceXform);
 }