Don't filter shortcut keys when a tab is opened in app ("windowed") mode.

chrome/browser/ui/browser.cc

 // Copyright (c) 2012 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 "chrome/browser/ui/browser.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #endif  // OS_WIN
@@ skipping 2957 matching lines @@
       key_code == ui::VKEY_F5 ||
       key_code == ui::VKEY_F6 ||
       key_code == ui::VKEY_F7 ||
       key_code == ui::VKEY_F8 ||
       key_code == ui::VKEY_F9 ||
       key_code == ui::VKEY_F10) {
     return true;
   }
 #endif
 
+  // In Apps mode, no keys are reserved.
+  if (is_app())
+    return false;
+
   if (window_->IsFullscreen() && command_id == IDC_FULLSCREEN)
     return true;
   return command_id == IDC_CLOSE_TAB ||
          command_id == IDC_CLOSE_WINDOW ||
          command_id == IDC_NEW_INCOGNITO_WINDOW ||
          command_id == IDC_NEW_TAB ||
          command_id == IDC_NEW_WINDOW ||
          command_id == IDC_RESTORE_TAB ||
          command_id == IDC_SELECT_NEXT_TAB ||
          command_id == IDC_SELECT_PREVIOUS_TAB ||
@@ skipping 2660 matching lines @@
   } else {
     LoginUIServiceFactory::GetForProfile(
         profile()->GetOriginalProfile())->ShowLoginUI(false);
   }
 #endif
 }
 
 void Browser::ToggleSpeechInput() {
   GetSelectedWebContents()->GetRenderViewHost()->ToggleSpeechInput();
 }