move program descriptor generation to flush

src/gpu/gl/GrGLProgramDesc.cpp

Index: src/gpu/gl/GrGLProgramDesc.cpp
diff --git a/src/gpu/gl/GrGLProgramDesc.cpp b/src/gpu/gl/GrGLProgramDesc.cpp
index 74f669f2e317a06ba616d582bcc2cf54f3993529..37e1596638bb6ae76f3dae39c6d6b051fca44cea 100644
--- a/src/gpu/gl/GrGLProgramDesc.cpp
+++ b/src/gpu/gl/GrGLProgramDesc.cpp
@@ -147,10 +147,10 @@ static bool get_meta_key(const GrProcessor& proc,
 }
 
 bool GrGLProgramDescBuilder::Build(const GrOptDrawState& optState,
-                                   const GrProgramDesc::DescInfo& descInfo,
                                    GrGpu::DrawType drawType,
                                    GrGpuGL* gpu,
                                    GrProgramDesc* desc) {
+    const GrProgramDesc::DescInfo& descInfo = optState.descInfo();
     bool inputColorIsUsed = descInfo.fInputColorIsUsed;
     bool inputCoverageIsUsed = descInfo.fInputCoverageIsUsed;
 
@@ -196,8 +196,6 @@ bool GrGLProgramDescBuilder::Build(const GrOptDrawState& optState,
 
     header->fHasGeometryProcessor = optState.hasGeometryProcessor();
 
-    header->fEmitsPointSize = GrGpu::kDrawPoints_DrawType == drawType;
-
     bool isPathRendering = GrGpu::IsPathRenderingDrawType(drawType);
     if (gpu->caps()->pathRenderingSupport() && isPathRendering) {
         header->fUseNvpr = true;