Fix most remaining WebUI link errors on Android.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index b56da6af4a0d30cce57f82ac69a644cd36367e34..ce9ca5e9b58f168a3bcaaa3445d15b8870e94395 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -2441,6 +2441,9 @@
             # Sync setup uses native ui.
             'browser/ui/webui/sync_setup_handler_unittest.cc',
 
+            # about:flags is unsupported.
+            'browser/about_flags_unittest.cc',
+
             'browser/ui/window_sizer_unittest.cc',
           ],
           'sources/': [
@@ -2451,6 +2454,7 @@
             ['exclude', '^browser/ui/tabs/'],
             ['exclude', '^browser/ui/toolbar/'],
             ['exclude', '^browser/ui/webui/options/'],
+            ['exclude', '^browser/ui/webui/options2/'],
             ['exclude', '^browser/ui/webui/print_preview/'],
             # No service process on Android.
             ['exclude', '^common/service_'],