Rename GrGLSLFragmentProcessor to GrFragmentProcessor::ProgramImpl

Bug: skia:11358

Change-Id: Ic179ddd9d52dca3fc0bd85b61db49097390b7f58
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/437681
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/effects/GrModulateAtlasCoverageEffect.cpp b/src/gpu/effects/GrModulateAtlasCoverageEffect.cpp
index c23e1e6..738e126 100644
--- a/src/gpu/effects/GrModulateAtlasCoverageEffect.cpp
+++ b/src/gpu/effects/GrModulateAtlasCoverageEffect.cpp
@@ -35,8 +35,9 @@
     this->cloneAndRegisterAllChildProcessors(that);
 }
 
-std::unique_ptr<GrGLSLFragmentProcessor> GrModulateAtlasCoverageEffect::onMakeProgramImpl() const {
-    class Impl : public GrGLSLFragmentProcessor {
+std::unique_ptr<GrFragmentProcessor::ProgramImpl>
+GrModulateAtlasCoverageEffect::onMakeProgramImpl() const {
+    class Impl : public ProgramImpl {
         void emitCode(EmitArgs& args) override {
             auto fp = args.fFp.cast<GrModulateAtlasCoverageEffect>();
             auto f = args.fFragBuilder;