cc: Don't swap PictureLayerTilingSet on activate.

cc/resources/tile_manager_unittest.cc

Index: cc/resources/tile_manager_unittest.cc
diff --git a/cc/resources/tile_manager_unittest.cc b/cc/resources/tile_manager_unittest.cc
index fdd876ebd50d11096db8bf1c2777866bef763ce6..784fcf1efc1d57d19dc3bfd95da66d1dc05bb1bb 100644
--- a/cc/resources/tile_manager_unittest.cc
+++ b/cc/resources/tile_manager_unittest.cc
@@ -109,7 +109,7 @@ class TileManagerTilePriorityQueueTest : public testing::Test {
     if (old_pending_root) {
       pending_layer.reset(
           static_cast<FakePictureLayerImpl*>(old_pending_root.release()));
-      pending_layer->SetRasterSource(pile);
+      pending_layer->SetRasterSourceOnPending(pile, Region(), false);
     } else {
       pending_layer =
           FakePictureLayerImpl::CreateWithRasterSource(pending_tree, id_, pile);
@@ -124,14 +124,6 @@ class TileManagerTilePriorityQueueTest : public testing::Test {
     pending_layer_->DoPostCommitInitializationIfNeeded();
   }
 
-  void CreateHighLowResAndSetAllTilesVisible() {
-    // Active layer must get updated first so pending layer can share from it.
-    active_layer_->CreateDefaultTilingsAndTiles();
-    active_layer_->SetAllTilesVisible();
-    pending_layer_->CreateDefaultTilingsAndTiles();
-    pending_layer_->SetAllTilesVisible();
-  }
-
   TileManager* tile_manager() { return host_impl_.tile_manager(); }
 
  protected: