Update how we send draws to gpu backend to reduce state setting.

src/gpu/batches/GrDrawAtlasBatch.cpp

Index: src/gpu/batches/GrDrawAtlasBatch.cpp
diff --git a/src/gpu/batches/GrDrawAtlasBatch.cpp b/src/gpu/batches/GrDrawAtlasBatch.cpp
index dab5b4f7c20601483b9ff24e3f9b4aa1fb42a278..a02865f627d41f6ce2278430efa3975398aad499 100644
--- a/src/gpu/batches/GrDrawAtlasBatch.cpp
+++ b/src/gpu/batches/GrDrawAtlasBatch.cpp
@@ -58,7 +58,7 @@ void GrDrawAtlasBatch::onPrepareDraws(Target* target) const {
                                                                      this->viewMatrix(),
                                                                      this->coverageIgnored()));
     
-    target->initDraw(gp, this->pipeline());
+    target->initDraw(gp, kTriangles_GrPrimitiveType);
     
     int instanceCount = fGeoData.count();
     size_t vertexStride = gp->getVertexStride();