Use a NotificationRegistrar to handle notification observing.

BUG=2381
Review URL: http://codereview.chromium.org/115607

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@16560 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 10 insertions, 16 deletions

diff --git a/chrome/browser/dom_ui/history_ui.cc b/chrome/browser/dom_ui/history_ui.cc
index 1c37d12..1fbbb38 100644
--- a/chrome/browser/dom_ui/history_ui.cc
+++ b/chrome/browser/dom_ui/history_ui.cc
@@ -113,20 +113,12 @@ BrowsingHistoryHandler::BrowsingHistoryHandler(DOMUI* dom_ui)
                         new DOMUIFavIconSource(dom_ui_->GetProfile())));
 
   // Get notifications when history is cleared.
-  NotificationService* service = NotificationService::current();
-  service->AddObserver(this, NotificationType::HISTORY_URLS_DELETED,
-                       Source<Profile>(
-                           dom_ui_->GetProfile()->GetOriginalProfile()));
+  registrar_.Add(this, NotificationType::HISTORY_URLS_DELETED,
+                 Source<Profile>(dom_ui_->GetProfile()->GetOriginalProfile()));
 }
 
 BrowsingHistoryHandler::~BrowsingHistoryHandler() {
   cancelable_consumer_.CancelAllRequests();
-
-  NotificationService* service = NotificationService::current();
-  service->RemoveObserver(this, NotificationType::HISTORY_URLS_DELETED,
-                          Source<Profile>(
-                              dom_ui_->GetProfile()->GetOriginalProfile()));
-
   if (remover_.get())
     remover_->RemoveObserver(this);
 }
diff --git a/chrome/browser/dom_ui/history_ui.h b/chrome/browser/dom_ui/history_ui.h
index a4f201c..f44e033 100644
--- a/chrome/browser/dom_ui/history_ui.h
+++ b/chrome/browser/dom_ui/history_ui.h
@@ -11,6 +11,7 @@
 #include "chrome/browser/dom_ui/dom_ui.h"
 #include "chrome/browser/cancelable_request.h"
 #include "chrome/browser/history/history.h"
+#include "chrome/common/notification_registrar.h"
 
 class GURL;
 
@@ -67,6 +68,8 @@ class BrowsingHistoryHandler : public DOMMessageHandler,
   // Figure out the query options for a month-wide query.
   history::QueryOptions CreateMonthQueryOptions(int month);
 
+  NotificationRegistrar registrar_;
+
   // Current search text.
   std::wstring search_text_;
 
diff --git a/chrome/browser/dom_ui/new_tab_ui.cc b/chrome/browser/dom_ui/new_tab_ui.cc
index e64f02e..ccef07f 100644
--- a/chrome/browser/dom_ui/new_tab_ui.cc
+++ b/chrome/browser/dom_ui/new_tab_ui.cc
@@ -1193,14 +1193,11 @@ NewTabUI::NewTabUI(TabContents* contents)
   }
 
   // Listen for theme installation.
-  NotificationService::current()->AddObserver(this,
-      NotificationType::THEME_INSTALLED, NotificationService::AllSources());
+  registrar_.Add(this, NotificationType::THEME_INSTALLED,
+                 NotificationService::AllSources());
 }
 
 NewTabUI::~NewTabUI() {
-  // Remove theme observer.
-  NotificationService::current()->RemoveObserver(this,
-      NotificationType::THEME_INSTALLED, NotificationService::AllSources());
 }
 
 void NewTabUI::Observe(NotificationType type,
diff --git a/chrome/browser/dom_ui/new_tab_ui.h b/chrome/browser/dom_ui/new_tab_ui.h
index 1efb8dd..6c3a2f1 100644
--- a/chrome/browser/dom_ui/new_tab_ui.h
+++ b/chrome/browser/dom_ui/new_tab_ui.h
@@ -6,7 +6,7 @@
 #define CHROME_BROWSER_DOM_UI_NEW_TAB_UI_H_
 
 #include "chrome/browser/dom_ui/dom_ui.h"
-#include "chrome/common/notification_observer.h"
+#include "chrome/common/notification_registrar.h"
 
 class GURL;
 class PrefService;
@@ -33,6 +33,8 @@ class NewTabUI : public DOMUI,
                const NotificationSource& source,
                const NotificationDetails& details);
 
+  NotificationRegistrar registrar_;
+
   // The message id that should be displayed in this NewTabUIContents
   // instance's motd area.
   int motd_message_id_;