Switch NOTIFICATION_TAB_PARENTED to use WebContents.

chrome/browser/sessions/session_tab_helper.cc

Index: chrome/browser/sessions/session_tab_helper.cc
diff --git a/chrome/browser/sessions/session_tab_helper.cc b/chrome/browser/sessions/session_tab_helper.cc
index 53abe02010ce9770a75721c89743e1779b5dfb3e..889df1970fc1674a827f7fdaac4dd7fb03b270a9 100644
--- a/chrome/browser/sessions/session_tab_helper.cc
+++ b/chrome/browser/sessions/session_tab_helper.cc
@@ -7,7 +7,6 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sessions/session_service.h"
 #include "chrome/browser/sessions/session_service_factory.h"
-#include "chrome/browser/ui/tab_contents/tab_contents.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/extensions/extension_messages.h"
 #include "content/public/browser/notification_service.h"
@@ -26,14 +25,10 @@ SessionTabHelper::~SessionTabHelper() {
 void SessionTabHelper::SetWindowID(const SessionID& id) {
   window_id_ = id;
 
-  // TODO(mpcomplete): Maybe this notification should send out a WebContents.
-  TabContents* tab = TabContents::FromWebContents(web_contents());
-  if (tab) {
-    content::NotificationService::current()->Notify(
-        chrome::NOTIFICATION_TAB_PARENTED,
-        content::Source<TabContents>(tab),
-        content::NotificationService::NoDetails());
-  }
+  content::NotificationService::current()->Notify(
+      chrome::NOTIFICATION_TAB_PARENTED,
+      content::Source<content::WebContents>(web_contents()),
+      content::NotificationService::NoDetails());
 
   // Extension code in the renderer holds the ID of the window that hosts it.
   // Notify it that the window ID changed.