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 1f94e3b872f6d46208238d7c29648e60c7e7fe97..746cac44b3f13de138924d02c83ccc890746081d 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2002,6 +2002,20 @@ const Experiment kExperiments[] = {
     // 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.
+#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.
 };
 
 const Experiment* experiments = kExperiments;