Switch from querying swizzle on caps to using swizzles stored on proxies.

Change-Id: I03f4a3affd6dda7a83bee8eec768dcaa93a6b801
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/220534
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
diff --git a/src/gpu/GrRenderTargetOpList.cpp b/src/gpu/GrRenderTargetOpList.cpp
index f07d77d..080893e 100644
--- a/src/gpu/GrRenderTargetOpList.cpp
+++ b/src/gpu/GrRenderTargetOpList.cpp
@@ -418,6 +418,7 @@
                 chain.head(),
                 fTarget->asRenderTargetProxy(),
                 chain.appliedClip(),
+                fTarget.get()->asRenderTargetProxy()->outputSwizzle(),
                 chain.dstProxy()
             };
             flushState->setOpArgs(&opArgs);
@@ -503,6 +504,7 @@
             chain.head(),
             fTarget->asRenderTargetProxy(),
             chain.appliedClip(),
+            fTarget.get()->asRenderTargetProxy()->outputSwizzle(),
             chain.dstProxy()
         };