toggle FPS counter in compositor

ui/compositor/compositor.cc

Index: ui/compositor/compositor.cc
diff --git a/ui/compositor/compositor.cc b/ui/compositor/compositor.cc
index 31f47c7d0a715531384d08827ba91eb8d4f5517e..686d121578f11ca457e06353e2f73629024c2c8c 100644
--- a/ui/compositor/compositor.cc
+++ b/ui/compositor/compositor.cc
@@ -147,8 +147,6 @@ Compositor::Compositor(CompositorDelegate* delegate,
   root_web_layer_.reset(compositor_support->createLayer());
   WebKit::WebLayerTreeView::Settings settings;
   CommandLine* command_line = CommandLine::ForCurrentProcess();
-  settings.showFPSCounter =

[enne (OOO), 2012/10/29 17:58:57]

Won't this break the --ui-show-fps-counter flag, since there's no corresponding
calls to showFPSCounter? I think you might be missing a
host_->setShowFPSCounter(...) call here to counteract that.

[egraether, 2012/10/30 00:03:57]

I did not realize that this was a different flag when I removed that. Anyhow, I
started testing what it did and if your suggestion works, but I couldn't figure
out what this does so far.
When is a Compositor instantiated? What is the --ui-show-fps-counter flag for?

[enne (OOO), 2012/10/30 16:09:45]

It's for Aura builds, which has a separate compositor in the browser process. 
This allows a top-level FPS counter for the desktop rather than on each tab.

[egraether, 2012/10/30 16:41:34]

And how is the fontAtlas loaded in that case?

[egraether, 2012/10/30 20:14:04]

It isn't and that caused some problems.
I removed the change here and re-added showFPSCounter to the
WebLayerTreeView::Settings, so --ui-show-fps-counter works again. I did not use
host_->setShowFPSCounter() instead, because that causes a dependency on the
associated WebKit patch which defines the method setShowFPSCounter.

-      command_line->HasSwitch(switches::kUIShowFPSCounter);
   settings.showPlatformLayerTree =
       command_line->HasSwitch(switches::kUIShowLayerTree);
   settings.refreshRate =