Support plumbing LatencyInfo through the old software path.

content/browser/renderer_host/render_widget_host_view_mac.h

Index: content/browser/renderer_host/render_widget_host_view_mac.h
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.h b/content/browser/renderer_host/render_widget_host_view_mac.h
index 171decffbac773594c15ecd793364ffea3d29a0b..8d6a561968a018d5ed9a58f4b3c36936f263b0e8 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.h
+++ b/content/browser/renderer_host/render_widget_host_view_mac.h
@@ -252,7 +252,8 @@ class RenderWidgetHostViewMac : public RenderWidgetHostViewBase,
   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;
@@ -398,6 +399,8 @@ class RenderWidgetHostViewMac : public RenderWidgetHostViewBase,
   // Whether to allow overlapping views.
   bool allow_overlapping_views_;
 
+  ui::LatencyInfo software_latency_info_;
+
   NSWindow* pepper_fullscreen_window() const {
     return pepper_fullscreen_window_;
   }
@@ -414,6 +417,8 @@ class RenderWidgetHostViewMac : public RenderWidgetHostViewBase,
 
   int window_number() const;
 
+  void FrameSwapped();
+
  private:
   friend class RenderWidgetHostView;
   friend class RenderWidgetHostViewMacTest;