Add command line switches and about:flag to enable FPS indicator and compositor layer tree.

chrome/common/render_messages.cc

Index: chrome/common/render_messages.cc
diff --git a/chrome/common/render_messages.cc b/chrome/common/render_messages.cc
index 300106aabf87f9a025207fd2f917182a28806bf1..aac7c5185ff69df8f10214352d5c4c1240be022c 100644
--- a/chrome/common/render_messages.cc
+++ b/chrome/common/render_messages.cc
@@ -672,6 +672,8 @@ void ParamTraits<WebPreferences>::Write(Message* m, const param_type& p) {
   WriteParam(m, p.experimental_webgl_enabled);
   WriteParam(m, p.gl_multisampling_enabled);
   WriteParam(m, p.show_composited_layer_borders);
+  WriteParam(m, p.show_composited_layer_tree);
+  WriteParam(m, p.show_fps_counter);
   WriteParam(m, p.accelerated_compositing_enabled);
   WriteParam(m, p.composite_to_texture_enabled);
   WriteParam(m, p.accelerated_2d_canvas_enabled);
@@ -729,6 +731,8 @@ bool ParamTraits<WebPreferences>::Read(const Message* m, void** iter,
       ReadParam(m, iter, &p->experimental_webgl_enabled) &&
       ReadParam(m, iter, &p->gl_multisampling_enabled) &&
       ReadParam(m, iter, &p->show_composited_layer_borders) &&
+      ReadParam(m, iter, &p->show_composited_layer_tree) &&
+      ReadParam(m, iter, &p->show_fps_counter) &&
       ReadParam(m, iter, &p->accelerated_compositing_enabled) &&
       ReadParam(m, iter, &p->composite_to_texture_enabled) &&
       ReadParam(m, iter, &p->accelerated_2d_canvas_enabled) &&