Support plumbing LatencyInfo through the old software path.

content/browser/renderer_host/render_widget_host_view_aura.h

Index: content/browser/renderer_host/render_widget_host_view_aura.h
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.h b/content/browser/renderer_host/render_widget_host_view_aura.h
index 0ed95a0ed0c0963722f3999924b8b28839cac0fe..40958644c8aaaad0adfb5d5b7c7384053163c4c6 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -180,7 +180,8 @@ class RenderWidgetHostViewAura
   virtual void DidUpdateBackingStore(
       const gfx::Rect& scroll_rect,
       const gfx::Vector2d& scroll_delta,
-      const std::vector<gfx::Rect>& copy_rects) OVERRIDE;
+      const std::vector<gfx::Rect>& copy_rects,
+      const ui::LatencyInfo& latency_info) OVERRIDE;
   virtual void RenderViewGone(base::TerminationStatus status,
                               int error_code) OVERRIDE;
   virtual void Destroy() OVERRIDE;
@@ -681,6 +682,8 @@ class RenderWidgetHostViewAura
 
   TouchEditingClient* touch_editing_client_;
 
+  ui::LatencyInfo software_latency_info_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAura);
 };