Introduce ui/wm/ directory.

ui/wm/test/minimal_shell.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ui/shell/minimal_shell.h"
+#include "ui/wm/test/minimal_shell.h"
 
 #include "ui/aura/client/default_activation_client.h"
 #include "ui/aura/client/default_capture_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/test/test_focus_client.h"
 #include "ui/views/corewm/compound_event_filter.h"
 #include "ui/views/corewm/input_method_event_filter.h"
 
-namespace shell {
+namespace wm {
 
 MinimalShell::MinimalShell(const gfx::Size& default_window_size) {
   aura::Env::CreateInstance();
   root_window_.reset(new aura::RootWindow(
       aura::RootWindow::CreateParams(
           gfx::Rect(default_window_size))));
   root_window_->Init();
   aura::client::SetWindowTreeClient(root_window_->window(), this);
 
   focus_client_.reset(new aura::test::TestFocusClient);
@@ skipping 20 matching lines @@
   root_window_event_filter_->RemoveHandler(input_method_filter_.get());
 }
 
 aura::Window* MinimalShell::GetDefaultParent(
     aura::Window* context,
     aura::Window* window,
     const gfx::Rect& bounds) {
   return root_window_->window();
 }
 
-}  // namespace shell
+}  // namespace wm