Re-land of "eliminated GrGLSLExpr".

This change is exactly the same as the last time it was landed; I believe the
underlying optimizer bug that was causing this to cause problems has been
fixed by a prior CL.
Bug: skia:
Change-Id: I5436422f094ea758caa3cd69e9338db31b1f93fa
Reviewed-on: https://skia-review.googlesource.com/15768
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/gpu/GrFragmentProcessor.cpp b/src/gpu/GrFragmentProcessor.cpp
index c22316d011..b0a36fce6d 100644
--- a/src/gpu/GrFragmentProcessor.cpp
+++ b/src/gpu/GrFragmentProcessor.cpp
@@ -287,7 +287,7 @@ sk_sp<GrFragmentProcessor> GrFragmentProcessor::MakeInputPremulAndMulByOutput(
             public:
                 void emitCode(EmitArgs& args) override {
                     GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
-                    this->emitChild(0, nullptr, args);
+                    this->emitChild(0, args);
                     fragBuilder->codeAppendf("%s.rgb *= %s.rgb;", args.fOutputColor,
                                                                 args.fInputColor);
                     fragBuilder->codeAppendf("%s *= %s.a;", args.fOutputColor, args.fInputColor);