Plumb LatencyInfo through aura.

ui/compositor/compositor.cc

Index: ui/compositor/compositor.cc
diff --git a/ui/compositor/compositor.cc b/ui/compositor/compositor.cc
index d6054784d6df94079a8fdc6a1b79436d3d7b5ded..22c8c1f4e6e411e7db87d4890c12e85b02aac6d0 100644
--- a/ui/compositor/compositor.cc
+++ b/ui/compositor/compositor.cc
@@ -615,6 +615,10 @@ void Compositor::ScheduleRedrawRect(const gfx::Rect& damage_rect) {
   host_->SetNeedsRedrawRect(damage_rect);
 }
 
+void Compositor::SetLatencyInfo(const ui::LatencyInfo& latency_info) {
+  host_->SetLatencyInfo(latency_info);
+}
+
 bool Compositor::ReadPixels(SkBitmap* bitmap,
                             const gfx::Rect& bounds_in_pixel) {
   if (bounds_in_pixel.right() > size().width() ||