Move apps/shell to extensions/shell.

extensions/shell/browser/default_shell_app_window_controller.h

Index: extensions/shell/browser/default_shell_app_window_controller.h
diff --git a/apps/shell/browser/default_shell_app_window_controller.h b/extensions/shell/browser/default_shell_app_window_controller.h
similarity index 74%
rename from apps/shell/browser/default_shell_app_window_controller.h
rename to extensions/shell/browser/default_shell_app_window_controller.h
index 36dccd834dd439aa28302098a62facb451aca924..558022c2ca86f68c6a73369f7232e570bb2df99f 100644
--- a/apps/shell/browser/default_shell_app_window_controller.h
+++ b/extensions/shell/browser/default_shell_app_window_controller.h
@@ -2,14 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef APPS_SHELL_BROWSER_DEFAULT_SHELL_APP_WINDOW_CONTROLLER_H_
-#define APPS_SHELL_BROWSER_DEFAULT_SHELL_APP_WINDOW_CONTROLLER_H_
+#ifndef EXTENSIONS_SHELL_BROWSER_DEFAULT_SHELL_APP_WINDOW_CONTROLLER_H_
+#define EXTENSIONS_SHELL_BROWSER_DEFAULT_SHELL_APP_WINDOW_CONTROLLER_H_
 
-#include "apps/shell/browser/shell_app_window_controller.h"
+#include "extensions/shell/browser/shell_app_window_controller.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 
-namespace apps {
+namespace extensions {
 
 class ShellDesktopController;
 
@@ -35,6 +35,6 @@ class DefaultShellAppWindowController : public ShellAppWindowController {
   DISALLOW_COPY_AND_ASSIGN(DefaultShellAppWindowController);
 };
 
-}  // namespace apps
+}  // namespace extensions
 
-#endif  // APPS_SHELL_BROWSER_DEFAULT_SHELL_APP_WINDOW_CONTROLLER_H_
+#endif  // EXTENSIONS_SHELL_BROWSER_DEFAULT_SHELL_APP_WINDOW_CONTROLLER_H_