Update GrSwizzle to only store key and not string.

Change-Id: Ieaba188e620e5c1f1d423109e628b0ca78f3afe0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/257394
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
diff --git a/src/gpu/effects/generated/GrRectBlurEffect.cpp b/src/gpu/effects/generated/GrRectBlurEffect.cpp
index 186dcfe..7643406 100644
--- a/src/gpu/effects/generated/GrRectBlurEffect.cpp
+++ b/src/gpu/effects/generated/GrRectBlurEffect.cpp
@@ -69,10 +69,16 @@
                 "sk_FragCoord.y);\n    } else {\n        l = half(sk_FragCoord.x - float(%s.x));\n "
                 "       r = half(float(%s.z) - sk_FragCoord.x);\n        t = half(sk_FragCoord.y - "
                 "float(%s.y));\n        b = half(float(",
-                fragBuilder->getProgramBuilder()->samplerSwizzle(args.fTexSamplers[0]).c_str(),
+                fragBuilder->getProgramBuilder()
+                        ->samplerSwizzle(args.fTexSamplers[0])
+                        .asString()
+                        .c_str(),
                 fragBuilder->getProgramBuilder()->samplerVariable(args.fTexSamplers[0]),
                 args.fUniformHandler->getUniformCStr(invSixSigmaVar),
-                fragBuilder->getProgramBuilder()->samplerSwizzle(args.fTexSamplers[0]).c_str(),
+                fragBuilder->getProgramBuilder()
+                        ->samplerSwizzle(args.fTexSamplers[0])
+                        .asString()
+                        .c_str(),
                 args.fOutputColor, args.fInputColor,
                 rectFVar.isValid() ? args.fUniformHandler->getUniformCStr(rectFVar) : "float4(0)",
                 rectFVar.isValid() ? args.fUniformHandler->getUniformCStr(rectFVar) : "float4(0)",
@@ -93,13 +99,25 @@
                 args.fUniformHandler->getUniformCStr(invSixSigmaVar),
                 args.fUniformHandler->getUniformCStr(invSixSigmaVar),
                 fragBuilder->getProgramBuilder()->samplerVariable(args.fTexSamplers[0]),
-                fragBuilder->getProgramBuilder()->samplerSwizzle(args.fTexSamplers[0]).c_str(),
+                fragBuilder->getProgramBuilder()
+                        ->samplerSwizzle(args.fTexSamplers[0])
+                        .asString()
+                        .c_str(),
                 fragBuilder->getProgramBuilder()->samplerVariable(args.fTexSamplers[0]),
-                fragBuilder->getProgramBuilder()->samplerSwizzle(args.fTexSamplers[0]).c_str(),
+                fragBuilder->getProgramBuilder()
+                        ->samplerSwizzle(args.fTexSamplers[0])
+                        .asString()
+                        .c_str(),
                 fragBuilder->getProgramBuilder()->samplerVariable(args.fTexSamplers[0]),
-                fragBuilder->getProgramBuilder()->samplerSwizzle(args.fTexSamplers[0]).c_str(),
+                fragBuilder->getProgramBuilder()
+                        ->samplerSwizzle(args.fTexSamplers[0])
+                        .asString()
+                        .c_str(),
                 fragBuilder->getProgramBuilder()->samplerVariable(args.fTexSamplers[0]),
-                fragBuilder->getProgramBuilder()->samplerSwizzle(args.fTexSamplers[0]).c_str(),
+                fragBuilder->getProgramBuilder()
+                        ->samplerSwizzle(args.fTexSamplers[0])
+                        .asString()
+                        .c_str(),
                 args.fOutputColor, args.fInputColor);
     }