Fix Crash in KeyPressListenersHandleEvent

content/browser/renderer_host/render_widget_host_view_gtk.cc

Index: content/browser/renderer_host/render_widget_host_view_gtk.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_gtk.cc b/content/browser/renderer_host/render_widget_host_view_gtk.cc
index fa4b8792989074456d8fc6c155c0ef7c48574a9d..6e82192af7e6e16df6b2f2267968e2f8391692c1 100644
--- a/content/browser/renderer_host/render_widget_host_view_gtk.cc
+++ b/content/browser/renderer_host/render_widget_host_view_gtk.cc
@@ -213,7 +213,8 @@ class RenderWidgetHostViewGtkWidget {
         host_view->is_fullscreen_;
     if (should_close_on_escape && GDK_Escape == event->keyval) {
       host_view->host_->Shutdown();
-    } if (host_view->host_->KeyPressListenersHandleEvent(event)) {
+    } if (host_view->host_ &&
+          host_view->host_->KeyPressListenersHandleEvent(event)) {
       return TRUE;
     } else {
       // Send key event to input method.