Support plumbing LatencyInfo through the old software path.

content/browser/renderer_host/render_widget_host_view_gtk.h

Index: content/browser/renderer_host/render_widget_host_view_gtk.h
diff --git a/content/browser/renderer_host/render_widget_host_view_gtk.h b/content/browser/renderer_host/render_widget_host_view_gtk.h
index 5ae9d2a8debc77453585f7d16631fabbbf8ae21f..033dcf5fe88d79392ef57eed12ad35dff2a5aa0f 100644
--- a/content/browser/renderer_host/render_widget_host_view_gtk.h
+++ b/content/browser/renderer_host/render_widget_host_view_gtk.h
@@ -91,7 +91,8 @@ class CONTENT_EXPORT RenderWidgetHostViewGtk
   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;
@@ -334,6 +335,8 @@ class CONTENT_EXPORT RenderWidgetHostViewGtk
   scoped_ptr<BrowserAccessibilityManager> browser_accessibility_manager_;
 
   ui::GtkSignalRegistrar signals_;
+
+  ui::LatencyInfo software_latency_info_;
 };
 
 }  // namespace content