Move stack_container and linked_list to the new containers subdirectory.

base/containers/stack_container_unittest.cc

Index: base/containers/stack_container_unittest.cc
diff --git a/base/stack_container_unittest.cc b/base/containers/stack_container_unittest.cc
similarity index 97%
rename from base/stack_container_unittest.cc
rename to base/containers/stack_container_unittest.cc
index 7efab363236c70c7bd3b26b72c638e7041a20707..3a1b3eddd4234e9ca3d8a9942c8fa9469d7881d9 100644
--- a/base/stack_container_unittest.cc
+++ b/base/containers/stack_container_unittest.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "base/stack_container.h"
+#include "base/containers/stack_container.h"
 
 #include <algorithm>
 
@@ -10,6 +10,8 @@
 #include "base/memory/ref_counted.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+namespace base {
+
 namespace {
 
 class Dummy : public base::RefCounted<Dummy> {
@@ -136,3 +138,5 @@ TEST(StackContainer, BufferAlignment) {
 
 template class StackVector<int, 2>;
 template class StackVector<scoped_refptr<Dummy>, 2>;
+
+}  // namespace base