Get views_unittests pass on touch build

base/message_pump_x.cc

Index: base/message_pump_x.cc
diff --git a/base/message_pump_x.cc b/base/message_pump_x.cc
index 9c0b90cd381632e03c0718e7ee782110d00adf70..8e098af95924e57269b906f21eb7975d926d3c0f 100644
--- a/base/message_pump_x.cc
+++ b/base/message_pump_x.cc
@@ -251,7 +251,7 @@ void MessagePumpX::EventDispatcherX(GdkEvent* event, gpointer data) {
   } else if (!pump_x->IsDispatchingEvent()) {
     if (event->type != GDK_NOTHING &&
         pump_x->capture_gdk_events_[event->type]) {
-      NOTREACHED() << "GDK received an event it shouldn't have";
+      NOTREACHED() << "GDK received an event it shouldn't have:" << event->type;
     }
   }