Move native_app_window code to apps areas

chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm

Index: chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.mm b/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
similarity index 99%
rename from chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.mm
rename to chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
index 67611f45199a79ff92c2949ceaaf0be0de9b1848..db40052f532158642d25946030678b591dbe5fda 100644
--- a/chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.mm
+++ b/chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm
@@ -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 "chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.h"
+#include "chrome/browser/ui/cocoa/apps/native_app_window_cocoa.h"
 
 #include "base/command_line.h"
 #include "base/mac/mac_util.h"
@@ -842,10 +842,3 @@ ShellNSWindow* NativeAppWindowCocoa::window() const {
   CHECK(!window || [window isKindOfClass:[ShellNSWindow class]]);
   return static_cast<ShellNSWindow*>(window);
 }
-
-// static
-NativeAppWindow* NativeAppWindow::Create(
-    ShellWindow* shell_window,
-    const ShellWindow::CreateParams& params) {
-  return new NativeAppWindowCocoa(shell_window, params);
-}