Clean up TCW, make it solely a hub for 1:1 observer/helper objects.

chrome/browser/alternate_nav_url_fetcher.cc

Index: chrome/browser/alternate_nav_url_fetcher.cc
diff --git a/chrome/browser/alternate_nav_url_fetcher.cc b/chrome/browser/alternate_nav_url_fetcher.cc
index fcb0f5a4690ba33e76e4b11bea258f21bf806192..2ab54556c8214360499f882951ad0ce37d862651 100644
--- a/chrome/browser/alternate_nav_url_fetcher.cc
+++ b/chrome/browser/alternate_nav_url_fetcher.cc
@@ -13,6 +13,7 @@
 #include "chrome/common/chrome_notification_types.h"
 #include "content/browser/tab_contents/navigation_controller.h"
 #include "content/browser/tab_contents/navigation_entry.h"
+#include "content/browser/tab_contents/tab_contents.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/common/url_fetcher.h"
 #include "grit/generated_resources.h"
@@ -131,7 +132,8 @@ void AlternateNavURLFetcher::Observe(
     case chrome::NOTIFICATION_INSTANT_COMMITTED: {
       // See above.
       NavigationController* controller =
-          &content::Source<TabContentsWrapper>(source)->controller();
+          &content::Source<TabContentsWrapper>(source)->
+              tab_contents()->controller();
       if (controller_ == controller) {
         delete this;
       } else if (!controller_) {