cc: Remove the remaining using-directives of namespace cc.

cc/test/tiled_layer_test_common.cc

Index: cc/test/tiled_layer_test_common.cc
diff --git a/cc/test/tiled_layer_test_common.cc b/cc/test/tiled_layer_test_common.cc
index f8db177ead215ba7d3b7b7cf708d2702d63729a9..4336eacd8f1f2f0174285fa803e960722e884503 100644
--- a/cc/test/tiled_layer_test_common.cc
+++ b/cc/test/tiled_layer_test_common.cc
@@ -4,7 +4,14 @@
 
 #include "cc/test/tiled_layer_test_common.h"
 
-using namespace cc;
+using cc::LayerTilingData;
+using cc::LayerUpdater;
+using cc::PriorityCalculator;
+using cc::PrioritizedResource;
+using cc::PrioritizedResourceManager;
+using cc::RenderingStats;
+using cc::ResourceUpdate;
+using cc::ResourceUpdateQueue;
 
 namespace WebKitTests {