Add exception in GLibLogHandler for Gtk theme warning

content/browser/browser_main_loop.cc

Index: content/browser/browser_main_loop.cc
diff --git a/content/browser/browser_main_loop.cc b/content/browser/browser_main_loop.cc
index 191cc5712d1b08044a3bc62a77a5b7d99ffb7acb..1762d79995c482269975164203244b9f2aa5185a 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -277,6 +277,8 @@ static void GLibLogHandler(const gchar* log_domain,
     LOG(ERROR) << message;
   } else if (strstr(message, "Could not obtain desktop path or name")) {
     LOG(ERROR) << message;
+  } else if (strstr(message, "Theme parsing error")) {
+    LOG(ERROR) << message;
   } else {
     LOG(DFATAL) << log_domain << ": " << message;
   }