Fix Crash in KeyPressListenersHandleEvent

Prevent RenderWidgetHostView from calling KeyPressListenersHandleEvent on a NULL member.


BUG=118351
TEST=No more crashes in content::RenderWidgetHostImpl::KeyPressListenerHandleEvent


Review URL: http://codereview.chromium.org/9702070

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@126948 0039d316-1c4b-4281-b951-d872f2087c98

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.