Rename GrCaps textureSwizzle to readSwizzle.

Change-Id: Ia5e2c4d3ca7346a1ad7559cd158ed632a70145bc
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/260699
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
diff --git a/src/gpu/GrDrawingManager.cpp b/src/gpu/GrDrawingManager.cpp
index aa8fb27..6e24270 100644
--- a/src/gpu/GrDrawingManager.cpp
+++ b/src/gpu/GrDrawingManager.cpp
@@ -924,7 +924,7 @@
     sk_sp<GrRenderTargetProxy> renderTargetProxy(sk_ref_sp(sProxy->asRenderTargetProxy()));
 
     GrSurfaceOrigin origin = renderTargetProxy->origin();
-    GrSwizzle texSwizzle = fContext->priv().caps()->getTextureSwizzle(sProxy->backendFormat(),
+    GrSwizzle readSwizzle = fContext->priv().caps()->getReadSwizzle(sProxy->backendFormat(),
                                                                       colorType);
     GrSwizzle outSwizzle = fContext->priv().caps()->getOutputSwizzle(sProxy->backendFormat(),
                                                                      colorType);
@@ -934,7 +934,7 @@
                                       std::move(renderTargetProxy),
                                       colorType,
                                       origin,
-                                      texSwizzle,
+                                      readSwizzle,
                                       outSwizzle,
                                       std::move(colorSpace),
                                       surfaceProps,