Move instanced index buffer creation to flush time

src/gpu/GrDashLinePathRenderer.cpp

Index: src/gpu/GrDashLinePathRenderer.cpp
diff --git a/src/gpu/GrDashLinePathRenderer.cpp b/src/gpu/GrDashLinePathRenderer.cpp
index bd49a72156f27a90c9a1f32488a74f42805a06e2..67dc6c770394b93dda55c7d0c146ab218284bd10 100644
--- a/src/gpu/GrDashLinePathRenderer.cpp
+++ b/src/gpu/GrDashLinePathRenderer.cpp
@@ -39,6 +39,6 @@ bool GrDashLinePathRenderer::onDrawPath(GrDrawTarget* target,
                                         bool useAA) {
     SkPoint pts[2];
     SkAssertResult(path.isLine(pts));
-    return GrDashingEffect::DrawDashLine(fGpu, target, pipelineBuilder, color,
+    return GrDashingEffect::DrawDashLine(target, pipelineBuilder, color,
                                          viewMatrix, pts, useAA, stroke);
 }