Convert //cc from scoped_ptr to std::unique_ptr.

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 7cd1a8b8e1052be8b7dd1035982b8853b377f2e4..3e52c8e84d8fb09fc5ed1a26655455d9bd506039 100644
--- a/cc/test/layer_tree_json_parser_unittest.cc
+++ b/cc/test/layer_tree_json_parser_unittest.cc
@@ -67,9 +67,9 @@ TEST_F(LayerTreeJsonParserSanityCheck, Basic) {
                                   &task_graph_runner);
   LayerTreeImpl* tree = host_impl.active_tree();
 
-  scoped_ptr<LayerImpl> root_impl(LayerImpl::Create(tree, 1));
-  scoped_ptr<LayerImpl> parent(LayerImpl::Create(tree, 2));
-  scoped_ptr<LayerImpl> child(LayerImpl::Create(tree, 3));
+  std::unique_ptr<LayerImpl> root_impl(LayerImpl::Create(tree, 1));
+  std::unique_ptr<LayerImpl> parent(LayerImpl::Create(tree, 2));
+  std::unique_ptr<LayerImpl> child(LayerImpl::Create(tree, 3));
 
   root_impl->SetBounds(gfx::Size(100, 100));
   parent->SetBounds(gfx::Size(50, 50));
@@ -95,8 +95,8 @@ TEST_F(LayerTreeJsonParserSanityCheck, EventHandlerRegions) {
                                   &task_graph_runner);
   LayerTreeImpl* tree = host_impl.active_tree();
 
-  scoped_ptr<LayerImpl> root_impl(LayerImpl::Create(tree, 1));
-  scoped_ptr<LayerImpl> touch_layer(LayerImpl::Create(tree, 2));
+  std::unique_ptr<LayerImpl> root_impl(LayerImpl::Create(tree, 1));
+  std::unique_ptr<LayerImpl> touch_layer(LayerImpl::Create(tree, 2));
 
   root_impl->SetBounds(gfx::Size(100, 100));
   touch_layer->SetBounds(gfx::Size(50, 50));