Fixes uneeded delete in InstantLoader. This is no longer needed as

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 0ab07310c455ec19495a814777dd6963dfec463c..eb33c3c38cf7cd8c4f25fea4d83fb9ad209f7397 100644
--- a/chrome/browser/instant/instant_loader.cc
+++ b/chrome/browser/instant/instant_loader.cc
@@ -130,8 +130,6 @@ class InstantLoader::FrameLoadObserver : public NotificationObserver {
         execute_js_id_(0) {
     registrar_.Add(this, NotificationType::LOAD_COMPLETED_MAIN_FRAME,
                    Source<TabContents>(tab_contents_));
-    registrar_.Add(this, NotificationType::TAB_CONTENTS_DESTROYED,
-                   Source<TabContents>(tab_contents_));
   }
 
   // Sets the text to send to the page.
@@ -173,10 +171,6 @@ class InstantLoader::FrameLoadObserver : public NotificationObserver {
         return;
       }
 
-      case NotificationType::TAB_CONTENTS_DESTROYED:
-        delete this;
-        return;
-
       default:
         NOTREACHED();
         break;