Switch to using the message loop rather than gtk_main().

webkit/tools/test_shell/gtk/webwidget_host.cc

Index: webkit/tools/test_shell/gtk/webwidget_host.cc
diff --git a/webkit/tools/test_shell/gtk/webwidget_host.cc b/webkit/tools/test_shell/gtk/webwidget_host.cc
index 46e3a83e2ab0f554999696593633e513ca5f7129..847a0a7aff059d834f4a819af93e373737a4a3c0 100644
--- a/webkit/tools/test_shell/gtk/webwidget_host.cc
+++ b/webkit/tools/test_shell/gtk/webwidget_host.cc
@@ -92,6 +92,10 @@ WebWidgetHost* WebWidgetHost::Create(gfx::WindowHandle box,
   return host;
 }
 
+void WebWidgetHost::DidScrollRect(int dx, int dy, const gfx::Rect& clip_rect) {
+  NOTIMPLEMENTED();
+}
+
 WebWidgetHost* FromWindow(gfx::WindowHandle view) {
   const gpointer p = g_object_get_data(G_OBJECT(view), "webwidgethost");
   return (WebWidgetHost* ) p;