cc: Move worker threads to content.

cc/test/layer_tree_json_parser_unittest.cc

Index: cc/test/layer_tree_json_parser_unittest.cc
diff --git a/cc/test/layer_tree_json_parser_unittest.cc b/cc/test/layer_tree_json_parser_unittest.cc
index a11d545c7ece54e7a7361af8aacd5ce1c325cdb2..8286a0ff65f3743ee0aada9aa133004a6ca7574a 100644
--- a/cc/test/layer_tree_json_parser_unittest.cc
+++ b/cc/test/layer_tree_json_parser_unittest.cc
@@ -65,7 +65,7 @@ class LayerTreeJsonParserSanityCheck : public testing::Test {
 TEST_F(LayerTreeJsonParserSanityCheck, Basic) {
   FakeImplProxy proxy;
   TestSharedBitmapManager shared_bitmap_manager;
-  FakeLayerTreeHostImpl host_impl(&proxy, &shared_bitmap_manager);
+  FakeLayerTreeHostImpl host_impl(&proxy, &shared_bitmap_manager, nullptr);
   LayerTreeImpl* tree = host_impl.active_tree();
 
   scoped_ptr<LayerImpl> root_impl(LayerImpl::Create(tree, 1));
@@ -94,7 +94,7 @@ TEST_F(LayerTreeJsonParserSanityCheck, Basic) {
 TEST_F(LayerTreeJsonParserSanityCheck, EventHandlerRegions) {
   FakeImplProxy proxy;
   TestSharedBitmapManager shared_bitmap_manager;
-  FakeLayerTreeHostImpl host_impl(&proxy, &shared_bitmap_manager);
+  FakeLayerTreeHostImpl host_impl(&proxy, &shared_bitmap_manager, nullptr);
   LayerTreeImpl* tree = host_impl.active_tree();
 
   scoped_ptr<LayerImpl> root_impl(LayerImpl::Create(tree, 1));