Remove WebUI NTP on Android.

Relanding https://codereview.chromium.org/256763004/

Original CL got reverted because it landed at the same time as
https://codereview.chromium.org/215733002

Chrome for Android has transitioned to using native NTP. This CL removes
the WebUI classes and resources.

[email protected],[email protected],[email protected]

BUG=284770

Review URL: https://codereview.chromium.org/259393006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@267346 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index c17fae006..704fade1 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -1020,7 +1020,6 @@
     ThemeSource* theme_source = new ThemeSource(profile_);
     content::URLDataSource::Add(profile_, theme_source);
   }
-#endif
 
   // Same for chrome://thumb/ resources.
   if (extensions::PermissionsData::HasHostPermission(
@@ -1028,6 +1027,7 @@
     ThumbnailSource* thumbnail_source = new ThumbnailSource(profile_, false);
     content::URLDataSource::Add(profile_, thumbnail_source);
   }
+#endif
 }
 
 void ExtensionService::NotifyExtensionUnloaded(