Replace targetHasUnifiedMultisampling in GrPB constructor

src/gpu/batches/GrAAConvexPathRenderer.cpp

Index: src/gpu/batches/GrAAConvexPathRenderer.cpp
diff --git a/src/gpu/batches/GrAAConvexPathRenderer.cpp b/src/gpu/batches/GrAAConvexPathRenderer.cpp
index ef6c0ae65964e18b6d9dfd023b8d8f93f97ca6a6..e875f1c3ec296c6fde341d35acd5df0d76f0b69f 100644
--- a/src/gpu/batches/GrAAConvexPathRenderer.cpp
+++ b/src/gpu/batches/GrAAConvexPathRenderer.cpp
@@ -997,6 +997,8 @@ private:
 bool GrAAConvexPathRenderer::onDrawPath(const DrawPathArgs& args) {
     GR_AUDIT_TRAIL_AUTO_FRAME(args.fDrawContext->auditTrail(),
                               "GrAAConvexPathRenderer::onDrawPath");
+    SkASSERT(!args.fDrawContext->isUnifiedMultisampled());
+
     if (args.fPath->isEmpty()) {
         return true;
     }
@@ -1008,7 +1010,7 @@ bool GrAAConvexPathRenderer::onDrawPath(const DrawPathArgs& args) {
 
     SkAutoTUnref<GrDrawBatch> batch(AAConvexPathBatch::Create(geometry));
 
-    GrPipelineBuilder pipelineBuilder(*args.fPaint, args.fDrawContext->isUnifiedMultisampled());
+    GrPipelineBuilder pipelineBuilder(*args.fPaint);
     pipelineBuilder.setUserStencil(args.fUserStencilSettings);
 
     args.fDrawContext->drawBatch(pipelineBuilder, *args.fClip, batch);