Revert "eliminated GrGLSLExpr"

This reverts commit 93f20f5629e52eed732d2b9d6dbbb351cc30b2cd.

Reason for revert: Mismerge readded deleted files.

Original change's description:
> eliminated GrGLSLExpr
> 
> Now that skslc performs all of the optimizations (and then some) that
> GrGLSLExpr is responsible for, it's just extra work for no benefit.
> 
> Bug: skia:
> Change-Id: I40b0629e00a33873ed9fc6c0a9f41d8350221f9a
> Reviewed-on: https://skia-review.googlesource.com/14560
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> 

TBR=bsalomon@google.com,ethannicholas@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: Ia8b723594527afe34489fc78a4b49039081b6390
Reviewed-on: https://skia-review.googlesource.com/15154
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/src/gpu/gl/builders/GrGLProgramBuilder.cpp b/src/gpu/gl/builders/GrGLProgramBuilder.cpp
index 03518194bc..9ddfa80baf 100644
--- a/src/gpu/gl/builders/GrGLProgramBuilder.cpp
+++ b/src/gpu/gl/builders/GrGLProgramBuilder.cpp
@@ -40,7 +40,12 @@ GrGLProgram* GrGLProgramBuilder::CreateProgram(const GrPipeline& pipeline,
     // uniforms, varyings, textures, etc
     GrGLProgramBuilder builder(gpu, pipeline, primProc, desc);
 
-    if (!builder.emitAndInstallProcs()) {
+    // TODO: Once all stages can handle taking a float or vec4 and correctly handling them we can
+    // seed correctly here
+    GrGLSLExpr4 inputColor;
+    GrGLSLExpr4 inputCoverage;
+
+    if (!builder.emitAndInstallProcs(&inputColor, &inputCoverage)) {
         builder.cleanupFragmentProcessors();
         return nullptr;
     }