Move instanced index buffer creation to flush time

src/gpu/GrAddPathRenderers_default.cpp

Index: src/gpu/GrAddPathRenderers_default.cpp
diff --git a/src/gpu/GrAddPathRenderers_default.cpp b/src/gpu/GrAddPathRenderers_default.cpp
index 06e98a98cfb3cc81bf0065d310cf6f6aa10f3931..0f675acb4c8c874321fd427b4df8aa79eb46dca9 100644
--- a/src/gpu/GrAddPathRenderers_default.cpp
+++ b/src/gpu/GrAddPathRenderers_default.cpp
@@ -39,7 +39,7 @@ void GrPathRenderer::AddPathRenderers(GrContext* ctx, GrPathRendererChain* chain
     if (GrPathRenderer* pr = GrStencilAndCoverPathRenderer::Create(ctx)) {
         chain->addPathRenderer(pr)->unref();
     }
-    if (GrPathRenderer* pr = GrAAHairLinePathRenderer::Create(ctx)) {
+    if (GrPathRenderer* pr = GrAAHairLinePathRenderer::Create()) {
         chain->addPathRenderer(pr)->unref();
     }
     chain->addPathRenderer(SkNEW(GrAAConvexPathRenderer))->unref();