Enabling page visibility api in the chrome browser.

content/browser/renderer_host/render_view_host.cc

Index: content/browser/renderer_host/render_view_host.cc
diff --git a/content/browser/renderer_host/render_view_host.cc b/content/browser/renderer_host/render_view_host.cc
index bd54a62459cc70a12927d821658beb04c664d563..ce62c1936ffe3e736be86886a6e09373a996a16f 100644
--- a/content/browser/renderer_host/render_view_host.cc
+++ b/content/browser/renderer_host/render_view_host.cc
@@ -250,6 +250,8 @@ void RenderViewHost::NavigateToURL(const GURL& url) {
   params.url = url;
   params.transition = PageTransition::LINK;
   params.navigation_type = ViewMsg_Navigate_Type::NORMAL;
+  DCHECK(delegate_);

[brettw, 2011/05/18 22:11:38]

This assertion isn't really helping since if it fails, the code will immediately
crash with an obvious null pointer exception. I usually just tell people to not
bother DCHECKing something that will immediately crash in a predictable way.

[Shishir, 2011/05/20 03:48:19]

Removed.

+  params.is_hidden = delegate_->IsHidden();
   Navigate(params);
 }