Consolidate ShouldUseNativeFrame/AlwaysUseNativeFrame/UseNativeFrame spaghetti.

chrome/browser/ui/browser.cc

 // Copyright (c) 2011 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 <shellapi.h>
 #include <windows.h>
 #endif  // OS_WIN
@@ skipping 3722 matching lines @@
   command_updater_.UpdateCommandEnabled(
       IDC_NEW_INCOGNITO_WINDOW,
       profile_->GetPrefs()->GetBoolean(prefs::kIncognitoEnabled));
   command_updater_.UpdateCommandEnabled(IDC_CLOSE_WINDOW, true);
   command_updater_.UpdateCommandEnabled(IDC_NEW_TAB, true);
   command_updater_.UpdateCommandEnabled(IDC_CLOSE_TAB, true);
   command_updater_.UpdateCommandEnabled(IDC_DUPLICATE_TAB, true);
   command_updater_.UpdateCommandEnabled(IDC_RESTORE_TAB, false);
   command_updater_.UpdateCommandEnabled(IDC_EXIT, true);
   command_updater_.UpdateCommandEnabled(IDC_TOGGLE_VERTICAL_TABS, true);
+  command_updater_.UpdateCommandEnabled(IDC_DEBUG_FRAME_TOGGLE, true);
 
   // Page-related commands
   command_updater_.UpdateCommandEnabled(IDC_EMAIL_PAGE_LOCATION, true);
   command_updater_.UpdateCommandEnabled(IDC_ENCODING_AUTO_DETECT, true);
   command_updater_.UpdateCommandEnabled(IDC_ENCODING_UTF8, true);
   command_updater_.UpdateCommandEnabled(IDC_ENCODING_UTF16LE, true);
   command_updater_.UpdateCommandEnabled(IDC_ENCODING_ISO88591, true);
   command_updater_.UpdateCommandEnabled(IDC_ENCODING_WINDOWS1252, true);
   command_updater_.UpdateCommandEnabled(IDC_ENCODING_GBK, true);
   command_updater_.UpdateCommandEnabled(IDC_ENCODING_GB18030, true);
@@ skipping 859 matching lines @@
   TabContents* current_tab = GetSelectedTabContents();
   if (current_tab) {
     content_restrictions = current_tab->content_restrictions();
     NavigationEntry* active_entry = current_tab->controller().GetActiveEntry();
     // See comment in UpdateCommandsForTabState about why we call url().
     if (!SavePackage::IsSavableURL(active_entry ? active_entry->url() : GURL()))
       content_restrictions |= CONTENT_RESTRICTION_SAVE;
   }
   return content_restrictions;
 }