Fix translate namespace

components/translate/core/browser/translate_prefs.h

Index: components/translate/core/browser/translate_prefs.h
diff --git a/components/translate/core/browser/translate_prefs.h b/components/translate/core/browser/translate_prefs.h
index cb6971df9630596a6b540085e7559a8084c7645d..c1b89c515c7aea82e8243fd06782b6b34181ece8 100644
--- a/components/translate/core/browser/translate_prefs.h
+++ b/components/translate/core/browser/translate_prefs.h
@@ -13,7 +13,6 @@
 
 class PrefService;
 class Profile;
-class TranslateAcceptLanguages;
 
 namespace base {
 class DictionaryValue;
@@ -24,6 +23,10 @@ namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
+namespace translate {
+
+class TranslateAcceptLanguages;
+
 // The wrapper of PrefService object for Translate.
 //
 // It is assumed that |prefs_| is alive while this instance is alive.
@@ -162,4 +165,6 @@ class TranslatePrefs {
   DISALLOW_COPY_AND_ASSIGN(TranslatePrefs);
 };
 
+}  // namespace translate
+
 #endif  // COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_PREFS_H_