Rename WebApplicationCacheHostImpl::IsNewMasterEntry enum to not use YES/NO.

content/child/appcache/web_application_cache_host_impl.h

Index: content/child/appcache/web_application_cache_host_impl.h
diff --git a/content/child/appcache/web_application_cache_host_impl.h b/content/child/appcache/web_application_cache_host_impl.h
index 3a1cc2dbb2f412cad3b1822731331bc86034d322..8fe5b308bb86d8c1532ce5d879ebe81a68581f06 100644
--- a/content/child/appcache/web_application_cache_host_impl.h
+++ b/content/child/appcache/web_application_cache_host_impl.h
@@ -57,11 +57,7 @@ class WebApplicationCacheHostImpl
   void getAssociatedCacheInfo(CacheInfo* info) override;
 
  private:
-  enum IsNewMasterEntry {
-    MAYBE,
-    YES,
-    NO
-  };
+  enum IsNewMasterEntry { MAYBE_NEW_ENTRY, NEW_ENTRY, OLD_ENTRY };
 
   blink::WebApplicationCacheHostClient* client_;
   AppCacheBackend* backend_;