Move casts.h and stl_util.h into base/.

Change-Id: Idb3bfa5cec3d146e488031d91265737cde2b4cf4
diff --git a/src/thread_pool.cc b/src/thread_pool.cc
index 1686ea6..a06f9d3 100644
--- a/src/thread_pool.cc
+++ b/src/thread_pool.cc
@@ -1,9 +1,26 @@
-#include "casts.h"
-#include "runtime.h"
-#include "stl_util.h"
-#include "thread.h"
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 #include "thread_pool.h"
 
+#include "base/casts.h"
+#include "base/stl_util.h"
+#include "runtime.h"
+#include "thread.h"
+
 namespace art {
 
 ThreadPoolWorker::ThreadPoolWorker(ThreadPool* thread_pool, const std::string& name,