Add a basic stub Polymer settings page at chrome://md-settings.

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 <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 18 matching lines @@
 #include "chrome/browser/ui/webui/flags_ui.h"
 #include "chrome/browser/ui/webui/flash_ui.h"
 #include "chrome/browser/ui/webui/gcm_internals_ui.h"
 #include "chrome/browser/ui/webui/help/help_ui.h"
 #include "chrome/browser/ui/webui/history_ui.h"
 #include "chrome/browser/ui/webui/identity_internals_ui.h"
 #include "chrome/browser/ui/webui/instant_ui.h"
 #include "chrome/browser/ui/webui/interstitials/interstitial_ui.h"
 #include "chrome/browser/ui/webui/invalidations_ui.h"
 #include "chrome/browser/ui/webui/local_state/local_state_ui.h"
+#include "chrome/browser/ui/webui/md_settings_ui.h"
 #include "chrome/browser/ui/webui/memory_internals/memory_internals_ui.h"
 #include "chrome/browser/ui/webui/net_internals/net_internals_ui.h"
 #include "chrome/browser/ui/webui/omnibox/omnibox_ui.h"
 #include "chrome/browser/ui/webui/options/options_ui.h"
 #include "chrome/browser/ui/webui/password_manager_internals/password_manager_internals_ui.h"
 #include "chrome/browser/ui/webui/plugins_ui.h"
 #include "chrome/browser/ui/webui/predictors/predictors_ui.h"
 #include "chrome/browser/ui/webui/profiler_ui.h"
 #include "chrome/browser/ui/webui/signin/inline_login_ui.h"
 #include "chrome/browser/ui/webui/signin/profile_signin_confirmation_ui.h"
@@ skipping 311 matching lines @@
   if (url.host() == chrome::kChromeUIGCMInternalsHost)
     return &NewWebUI<GCMInternalsUI>;
   // 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 &&
+      ::switches::MdSettingsEnabled()) {
+    LOG(ERROR) << "url host is MD settings host";

[stevenjb, 2015/02/04 02:19:15]

VLOG (I know it's less convenient but we shouldn't check in ERROR for non
errors)

[michaelpg, 2015/02/04 02:35:29]

I would just remove this logging altogether.

[Oren Blasberg, 2015/02/04 18:31:51]

Done. Sorry guys I must've forgotten to do 'git cl upload' one more time before
mailing the CL since I'd already removed this locally.

+    return &NewWebUI<MdSettingsUI>;
+  }
   // Android does not support plugins for now.
   if (url.host() == chrome::kChromeUIPluginsHost)
     return &NewWebUI<PluginsUI>;
   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 &&
        ::switches::AboutInSettingsEnabled())) {
+    LOG(ERROR) << "url host is regular settings host";

[stevenjb, 2015/02/04 02:19:15]

And definitely not here :)

[Oren Blasberg, 2015/02/04 18:31:51]

Done.

     return &NewWebUI<options::OptionsUI>;
   }
   if (url.host() == chrome::kChromeUISuggestionsInternalsHost)
     return &NewWebUI<SuggestionsInternalsUI>;
   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)
@@ skipping 330 matching lines @@
 #endif
 
   // Android doesn't use the plugins pages.
   if (page_url.host() == chrome::kChromeUIPluginsHost)
     return PluginsUI::GetFaviconResourceBytes(scale_factor);
 
 #endif
 
   return NULL;
 }