Removes pinning code from TopSites as we no longer need it.

chrome/browser/automation/automation_provider_observers.cc

Index: chrome/browser/automation/automation_provider_observers.cc
diff --git a/chrome/browser/automation/automation_provider_observers.cc b/chrome/browser/automation/automation_provider_observers.cc
index 60e7897df5de071b4baffd66a844c49094d92456..1d0afa9226fd598d353bebbe095794e9946d7342 100644
--- a/chrome/browser/automation/automation_provider_observers.cc
+++ b/chrome/browser/automation/automation_provider_observers.cc
@@ -2140,7 +2140,6 @@ void NTPInfoObserver::OnTopSitesReceived(
     DictionaryValue* dict = new DictionaryValue;
     dict->SetString("url", visited.url.spec());
     dict->SetString("title", visited.title);
-    dict->SetBoolean("is_pinned", top_sites_->IsURLPinned(visited.url));
     list_value->Append(dict);
   }
   ntp_info_->Set("most_visited", list_value);