Remove deprecated TabContentsDelegate::OpenURLFromTab variant

chrome/browser/instant/instant_loader.cc

Index: chrome/browser/instant/instant_loader.cc
diff --git a/chrome/browser/instant/instant_loader.cc b/chrome/browser/instant/instant_loader.cc
index 363ae459f55c14c603820f0665db5ec843b50538..96017dc51a86c6b4a74bce025fb5317265e01857 100644
--- a/chrome/browser/instant/instant_loader.cc
+++ b/chrome/browser/instant/instant_loader.cc
@@ -689,8 +689,8 @@ bool InstantLoader::Update(TabContentsWrapper* tab_contents,
     DCHECK(template_url_id_ == 0);
     preview_tab_contents_delegate_->PrepareForNewLoad();
     frame_load_observer_.reset(NULL);
-    preview_contents_->controller().LoadURL(url_, GURL(), transition_type,
-                                            std::string());
+    preview_contents_->controller().LoadURL(url_, content::Referrer(),
+                                            transition_type, std::string());
   }
   return true;
 }
@@ -1072,8 +1072,8 @@ void InstantLoader::LoadInstantURL(TabContentsWrapper* tab_contents,
   CommandLine* cl = CommandLine::ForCurrentProcess();
   if (cl->HasSwitch(switches::kInstantURL))
     instant_url = GURL(cl->GetSwitchValueASCII(switches::kInstantURL));
-  preview_contents_->controller().LoadURL(instant_url, GURL(), transition_type,
-                                          std::string());
+  preview_contents_->controller().LoadURL(instant_url, content::Referrer(),
+                                          transition_type, std::string());
   RenderViewHost* host = preview_contents_->render_view_host();
   preview_contents_->tab_contents()->HideContents();