Modifying language detection code

components/translate/core/language_detection/language_detection_util.cc

 // Copyright 2014 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 "components/translate/core/language_detection/language_detection_util.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 179 matching lines @@
                               pred_lang_hash);
   if (predicted_language != chrome_lang_id::NNetLanguageIdentifier::kUnknown) {
     UMA_HISTOGRAM_PERCENTAGE("Translate.CLD3.LanguagePercentage",
                              static_cast<int>(100 * lang_id_result.proportion));
   }
 
   if (is_cld_reliable != NULL) {
     *is_cld_reliable = prediction_reliable;
   }
 
+  // Ignore unreliable, "unknown", and xx-Latn predictions that are currently
+  // not supported.
   if (prediction_reliable &&
+      predicted_language != "bg-Latn" &&
+      predicted_language != "el-Latn" &&
+      predicted_language != "ja-Latn" &&
+      predicted_language != "ru-Latn" &&
+      predicted_language != "zh-Latn" &&
       predicted_language !=
           chrome_lang_id::NNetLanguageIdentifier::kUnknown) {
     // CLD3 returns 'zh' for Chinese but Translate doesn't accept it. Thus,
     // analogously to CLD2, 'zh-CN' is returned instead.
     if (predicted_language == "zh") {
       language = "zh-CN";
     } else {
       language = predicted_language;
     }
   }
@@ skipping 207 matching lines @@
   // distinguish from English, and the language is one of well-known languages
   // which often provide "en-*" meta information mistakenly.
   for (size_t i = 0; i < arraysize(kWellKnownCodesOnWrongConfiguration); ++i) {
     if (cld_language == kWellKnownCodesOnWrongConfiguration[i])
       return true;
   }
   return false;
 }
 
 }  // namespace translate