Move apps/shell to extensions/shell.

extensions/shell/browser/default_shell_app_window_controller.cc

Index: extensions/shell/browser/default_shell_app_window_controller.cc
diff --git a/apps/shell/browser/default_shell_app_window_controller.cc b/extensions/shell/browser/default_shell_app_window_controller.cc
similarity index 83%
rename from apps/shell/browser/default_shell_app_window_controller.cc
rename to extensions/shell/browser/default_shell_app_window_controller.cc
index 3ec5b6bc848ee067ba4af2efb9f48196de34864b..778bc094218799a98502c7bb788e10c535e75566 100644
--- a/apps/shell/browser/default_shell_app_window_controller.cc
+++ b/extensions/shell/browser/default_shell_app_window_controller.cc
@@ -2,15 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "apps/shell/browser/default_shell_app_window_controller.h"
+#include "extensions/shell/browser/default_shell_app_window_controller.h"
 
-#include "apps/shell/browser/shell_app_window.h"
-#include "apps/shell/browser/shell_desktop_controller.h"
 #include "base/logging.h"
+#include "extensions/shell/browser/shell_app_window.h"
+#include "extensions/shell/browser/shell_desktop_controller.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_tree_host.h"
 
-namespace apps {
+namespace extensions {
 
 DefaultShellAppWindowController::DefaultShellAppWindowController(
     ShellDesktopController* shell_desktop_controller)
@@ -42,4 +42,4 @@ void DefaultShellAppWindowController::CloseAppWindows() {
   app_window_.reset();
 }
 
-}  // namespace apps
+}  // namespace extensions