[MD Settings] Add feature to enable md-settings by default.

chrome/browser/ui/webui/chrome_web_ui_controller_factory.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/webui/chrome_web_ui_controller_factory.h"
 
 #include <stddef.h>
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "chrome/browser/about_flags.h"
 #include "chrome/browser/dom_distiller/dom_distiller_service_factory.h"
 #include "chrome/browser/engagement/site_engagement_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/search/suggestions/suggestions_ui.h"
+#include "chrome/browser/ui/chrome_pages.h"
 #include "chrome/browser/ui/webui/about_ui.h"
 #include "chrome/browser/ui/webui/bookmarks_ui.h"
 #include "chrome/browser/ui/webui/components_ui.h"
 #include "chrome/browser/ui/webui/constrained_web_dialog_ui.h"
 #include "chrome/browser/ui/webui/crashes_ui.h"
 #include "chrome/browser/ui/webui/device_log_ui.h"
 #include "chrome/browser/ui/webui/domain_reliability_internals_ui.h"
 #include "chrome/browser/ui/webui/engagement/site_engagement_ui.h"
 #include "chrome/browser/ui/webui/flags_ui.h"
 #include "chrome/browser/ui/webui/flash_ui.h"
@@ skipping 359 matching lines @@
   if (url.host() == chrome::kChromeUIDownloadsHost)
     return &NewWebUI<MdDownloadsUI>;
   // Help is implemented with native UI elements on Android.
   if (url.host() == chrome::kChromeUIHelpFrameHost)
     return &NewWebUI<HelpUI>;
   // Identity API is not available on Android.
   if (url.host() == chrome::kChromeUIIdentityInternalsHost)
     return &NewWebUI<IdentityInternalsUI>;
   if (url.host() == chrome::kChromeUINewTabHost)
     return &NewWebUI<NewTabUI>;
-  if (url.host() == chrome::kChromeUIMdSettingsHost)
+  if (url.host() == chrome::GetMdSettingsHost())
     return &NewWebUI<settings::MdSettingsUI>;
   // If the material design extensions page is enabled, it gets its own host.
   // Otherwise, it's handled by the uber settings page.
   if (url.host() == chrome::kChromeUIExtensionsHost &&
       ::switches::MdExtensionsEnabled()) {
     return &NewWebUI<extensions::ExtensionsUI>;
   }
   // Material Design history is on its own host, rather than on an Uber page.
   if (base::FeatureList::IsEnabled(features::kMaterialDesignHistoryFeature) &&
       url.host() == chrome::kChromeUIHistoryHost) {
     return &NewWebUI<MdHistoryUI>;
   }
   if (url.host() == chrome::kChromeUIQuotaInternalsHost)
     return &NewWebUI<QuotaInternalsUI>;
   // Settings are implemented with native UI elements on Android.
   // Handle chrome://settings if settings in a window and about in settings
   // are enabled.
   if (url.host() == chrome::kChromeUISettingsFrameHost ||
-      (url.host() == chrome::kChromeUISettingsHost &&
+      (url.host() == chrome::GetLegacySettingsHost() &&
        ::switches::AboutInSettingsEnabled())) {
     return &NewWebUI<options::OptionsUI>;
   }
   if (url.host() == chrome::kChromeUISyncFileSystemInternalsHost)
     return &NewWebUI<SyncFileSystemInternalsUI>;
   if (url.host() == chrome::kChromeUISystemInfoHost)
     return &NewWebUI<SystemInfoUI>;
   // Uber frame is not used on Android.
   if (url.host() == chrome::kChromeUIUberFrameHost)
     return &NewWebUI<UberFrameUI>;
@@ skipping 339 matching lines @@
 
   // Flash is not available on android.
   if (page_url.host() == chrome::kChromeUIFlashHost)
     return FlashUI::GetFaviconResourceBytes(scale_factor);
 
   // Android uses the native download manager.
   if (page_url.host() == chrome::kChromeUIDownloadsHost)
     return MdDownloadsUI::GetFaviconResourceBytes(scale_factor);
 
   // Android doesn't use the Options/Settings pages.
-  if (page_url.host() == chrome::kChromeUISettingsHost ||
+  if (page_url.host() == chrome::GetLegacySettingsHost() ||
       page_url.host() == chrome::kChromeUISettingsFrameHost ||
-      page_url.host() == chrome::kChromeUIMdSettingsHost)
+      page_url.host() == chrome::GetMdSettingsHost())
     return settings_utils::GetFaviconResourceBytes(scale_factor);
 
 #if defined(ENABLE_EXTENSIONS)
   if (page_url.host() == chrome::kChromeUIExtensionsHost ||
       page_url.host() == chrome::kChromeUIExtensionsFrameHost)
     return extensions::ExtensionsUI::GetFaviconResourceBytes(scale_factor);
 #endif
 
   // Android doesn't use the plugins pages.
   if (page_url.host() == chrome::kChromeUIPluginsHost)
     return PluginsUI::GetFaviconResourceBytes(scale_factor);
 
 #endif
 
   return NULL;
 }