[Profiles] Notify observers if a profile switches bw/ default and custom names.

chrome/browser/profiles/profile_info_cache.cc

Index: chrome/browser/profiles/profile_info_cache.cc
diff --git a/chrome/browser/profiles/profile_info_cache.cc b/chrome/browser/profiles/profile_info_cache.cc
index 3e7c05c3c2a4f4bd141d3e47e2ed662488ec0af5..0b01f095c8991206cf6b8a72effde167cbbb4038 100644
--- a/chrome/browser/profiles/profile_info_cache.cc
+++ b/chrome/browser/profiles/profile_info_cache.cc
@@ -739,11 +739,22 @@ void ProfileInfoCache::SetProfileIsUsingDefaultNameAtIndex(
   if (value == ProfileIsUsingDefaultNameAtIndex(index))
     return;
 
+  base::string16 old_display_name = GetNameOfProfileAtIndex(index);
+
   scoped_ptr<base::DictionaryValue> info(
       GetInfoForProfileAtIndex(index)->DeepCopy());
   info->SetBoolean(kIsUsingDefaultNameKey, value);
   // This takes ownership of |info|.
   SetInfoForProfileAtIndex(index, info.release());
+
+  base::string16 new_display_name = GetNameOfProfileAtIndex(index);
+  const base::FilePath profile_path = GetPathOfProfileAtIndex(index);
+
+  if (old_display_name != new_display_name) {
+    FOR_EACH_OBSERVER(ProfileInfoCacheObserver,
+                      observer_list_,
+                      OnProfileNameChanged(profile_path, old_display_name));
+  }
 }
 
 void ProfileInfoCache::SetProfileIsUsingDefaultAvatarAtIndex(