cc: Fix build issues for adding ‘chromium_code’: 1 to cc.gyp and cc_tests.gyp

cc/trees/layer_tree_host_common.cc

Index: cc/trees/layer_tree_host_common.cc
diff --git a/cc/trees/layer_tree_host_common.cc b/cc/trees/layer_tree_host_common.cc
index d4ff04e70081a1018dd3d34f466f8f06432d6342..100ec15665a8fc5bd60bca6ffdf703d3f66df91b 100644
--- a/cc/trees/layer_tree_host_common.cc
+++ b/cc/trees/layer_tree_host_common.cc
@@ -1332,7 +1332,7 @@ void LayerTreeHostCommon::CalculateDrawProperties(
                                                  update_tile_priorities);
 
   // The dummy layer list should not have been used.
-  DCHECK_EQ(dummy_layer_list.size(), 0);
+  DCHECK(dummy_layer_list.empty());
   // A root layer render_surface should always exist after
   // CalculateDrawProperties.
   DCHECK(root_layer->render_surface());
@@ -1385,7 +1385,7 @@ void LayerTreeHostCommon::CalculateDrawProperties(
       update_tile_priorities);
 
   // The dummy layer list should not have been used.
-  DCHECK_EQ(dummy_layer_list.size(), 0);
+  DCHECK(dummy_layer_list.empty());
   // A root layer render_surface should always exist after
   // CalculateDrawProperties.
   DCHECK(root_layer->render_surface());