Remove TopSites notification in favor of Observers

chrome/browser/history/chrome_history_client.cc

Index: chrome/browser/history/chrome_history_client.cc
diff --git a/chrome/browser/history/chrome_history_client.cc b/chrome/browser/history/chrome_history_client.cc
index ea979be370bd4b1b531ab34ba7b888559f0cacec..395aeab46ab9fbdde9670239f76a2e63f941ff5c 100644
--- a/chrome/browser/history/chrome_history_client.cc
+++ b/chrome/browser/history/chrome_history_client.cc
@@ -5,30 +5,18 @@
 #include "chrome/browser/history/chrome_history_client.h"
 
 #include "base/logging.h"
-#include "chrome/browser/chrome_notification_types.h"
-#include "chrome/browser/history/history_notifications.h"
-#include "chrome/browser/history/top_sites.h"
 #include "chrome/browser/ui/profile_error_dialog.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/grit/chromium_strings.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/bookmarks/browser/bookmark_model.h"
-#include "content/public/browser/notification_service.h"
 
-ChromeHistoryClient::ChromeHistoryClient(BookmarkModel* bookmark_model,
-                                         Profile* profile,
-                                         history::TopSites* top_sites)
-    : bookmark_model_(bookmark_model),
-      profile_(profile),
-      top_sites_(top_sites) {
+ChromeHistoryClient::ChromeHistoryClient(BookmarkModel* bookmark_model)
+    : bookmark_model_(bookmark_model) {
   DCHECK(bookmark_model_);
-  if (top_sites_)
-    top_sites_->AddObserver(this);
 }
 
 ChromeHistoryClient::~ChromeHistoryClient() {
-  if (top_sites_)
-    top_sites_->RemoveObserver(this);
 }
 
 void ChromeHistoryClient::BlockUntilBookmarksLoaded() {
@@ -80,17 +68,3 @@ void ChromeHistoryClient::Shutdown() {
   // sees an incorrect view of bookmarks, but it's better than a deadlock.
   bookmark_model_->Shutdown();
 }
-
-void ChromeHistoryClient::TopSitesLoaded(history::TopSites* top_sites) {
-  content::NotificationService::current()->Notify(
-      chrome::NOTIFICATION_TOP_SITES_LOADED,
-      content::Source<Profile>(profile_),
-      content::Details<history::TopSites>(top_sites));
-}
-
-void ChromeHistoryClient::TopSitesChanged(history::TopSites* top_sites) {
-  content::NotificationService::current()->Notify(
-      chrome::NOTIFICATION_TOP_SITES_CHANGED,
-      content::Source<history::TopSites>(top_sites),
-      content::NotificationService::NoDetails());
-}