cc: Remove forbidden using namespace directives.

cc/prioritized_resource_unittest.cc

Index: cc/prioritized_resource_unittest.cc
diff --git a/cc/prioritized_resource_unittest.cc b/cc/prioritized_resource_unittest.cc
index c542395c6425c9b14c9f3f913c32700295f95684..97e0aaa5486fe36571b65661eef86913c6ab7dad 100644
--- a/cc/prioritized_resource_unittest.cc
+++ b/cc/prioritized_resource_unittest.cc
@@ -14,7 +14,6 @@
 #include "cc/test/tiled_layer_test_common.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using namespace cc;
 using namespace WebKitTests;
 
 namespace cc {
@@ -98,8 +97,6 @@ protected:
     scoped_ptr<ResourceProvider> m_resourceProvider;
 };
 
-}
-
 namespace {
 
 TEST_F(PrioritizedResourceTest, requestTextureExceedingMaxLimit)
@@ -704,5 +701,5 @@ TEST_F(PrioritizedResourceTest, usageStatistics)
     resourceManager->clearAllMemory(resourceProvider());
 }
 
-
-}  // anonymous namespace
+}  // namespace
+}  // namespace cc