Bug 735230 - Part 3: Use the new compositor pause/resume events. r=kats

    /** Implementation of FlexibleGLSurfaceView.Listener */

    public void compositionPauseRequested() {

        GeckoAppShell.schedulePauseComposition();

        // We need to coordinate with Gecko when pausing composition, to ensure

        // that Gecko never executes a draw event while the compositor is paused.

        GeckoAppShell.sendEventToGecko(GeckoEvent.createCompositorPauseEvent());

    }

    /** Implementation of FlexibleGLSurfaceView.Listener */

    public void compositionResumeRequested() {

        // Asking Gecko to resume the compositor takes too long (see

        // https://bugzilla.mozilla.org/show_bug.cgi?id=735230#c23), so we

        // resume the compositor directly. We still need to inform Gecko about

        // the compositor resuming, so that Gecko knows that it can now draw.

        GeckoAppShell.scheduleResumeComposition();

        GeckoAppShell.sendEventToGecko(GeckoEvent.createCompositorResumeEvent());

    }

    /** Implementation of FlexibleGLSurfaceView.Listener */

    public void surfaceChanged(int width, int height) {

        compositionPauseRequested();

        mLayerController.setViewportSize(new FloatSize(width, height));

        // We need to make this call even when the compositor isn't currently

        // paused (e.g. during an orientation change), to make the compositor

        // aware of the changed surface.

        compositionResumeRequested();

        renderRequested();

    }