Conditionally insert gl_PointSize into shaders.

src/gpu/instanced/GLInstancedRendering.cpp

Index: src/gpu/instanced/GLInstancedRendering.cpp
diff --git a/src/gpu/instanced/GLInstancedRendering.cpp b/src/gpu/instanced/GLInstancedRendering.cpp
index bd014ecca87717b12122da04e837587297f2df0e..dabfe4e02d459e93cd9a45981bfdff07ef5db805 100644
--- a/src/gpu/instanced/GLInstancedRendering.cpp
+++ b/src/gpu/instanced/GLInstancedRendering.cpp
@@ -204,7 +204,7 @@ void GLInstancedRendering::onDraw(const GrPipeline& pipeline, const InstanceProc
     if (!fDrawIndirectBuffer && !fGLDrawCmdsInfo) {
         return; // beginFlush was not successful.
     }
-    if (!this->glGpu()->flushGLState(pipeline, instProc)) {
+    if (!this->glGpu()->flushGLState(pipeline, instProc, false)) {
         return;
     }