cc: Don't swap PictureLayerTilingSet on activate.

cc/trees/layer_tree_host_impl_unittest.cc

Index: cc/trees/layer_tree_host_impl_unittest.cc
diff --git a/cc/trees/layer_tree_host_impl_unittest.cc b/cc/trees/layer_tree_host_impl_unittest.cc
index 75f753183df09286a7d180151da80538a25161aa..c8e27a90ab7c6e552464ec40c3e5731bfd8c8297 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -7795,7 +7795,7 @@ TEST_F(LayerTreeHostImplTest, ScrollAnimated) {
 TEST_F(LayerTreeHostImplTest, GetPictureLayerImplPairs) {
   host_impl_->CreatePendingTree();
   host_impl_->pending_tree()->SetRootLayer(
-      PictureLayerImpl::Create(host_impl_->pending_tree(), 10));
+      PictureLayerImpl::Create(host_impl_->pending_tree(), 10, false));
 
   LayerTreeImpl* pending_tree = host_impl_->pending_tree();
   LayerImpl* pending_layer = pending_tree->root_layer();
@@ -7836,7 +7836,7 @@ TEST_F(LayerTreeHostImplTest, GetPictureLayerImplPairs) {
   // should get two pairs.
   host_impl_->CreatePendingTree();
   host_impl_->pending_tree()->root_layer()->AddChild(
-      PictureLayerImpl::Create(host_impl_->pending_tree(), 11));
+      PictureLayerImpl::Create(host_impl_->pending_tree(), 11, false));
 
   LayerImpl* new_pending_layer = pending_tree->root_layer()->children()[0];