Enables the user to select multiple languages for spellchecking (UI)

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 3a80f0000e905bb948a49a2710953d59bf96a8c5..2b7284fcf35da2a0632db4a70ad1a989d6aae319 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1997,6 +1997,17 @@ const Experiment kExperiments[] = {
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnableMacViewsNativeAppWindows,
                                switches::kDisableMacViewsNativeAppWindows)},
 #endif
+#if defined(ENABLE_SPELLCHECK) && \
+    (defined(OS_LINUX) || defined(OS_WIN) || defined(OS_CHROMEOS))
+  {
+    "enable-multilingual-spellchecker",
+    IDS_FLAGS_ENABLE_MULTILINGUAL_SPELLCHECKER_NAME,
+    IDS_FLAGS_ENABLE_MULTILINGUAL_SPELLCHECKER_DESCRIPTION,
+    kOsWin | kOsLinux | kOsCrOS,
+    SINGLE_VALUE_TYPE(switches::kEnableMultilingualSpellChecker)
+  },
+#endif
+
     // NOTE: Adding new command-line switches requires adding corresponding
     // entries to enum "LoginCustomFlags" in histograms.xml. See note in
     // histograms.xml and don't forget to run AboutFlagsHistogramTest unit test.