Reduce usage of FOR_EACH_OBSERVER macro in components/

components/sessions/core/tab_restore_service_helper.cc

Index: components/sessions/core/tab_restore_service_helper.cc
diff --git a/components/sessions/core/tab_restore_service_helper.cc b/components/sessions/core/tab_restore_service_helper.cc
index 05094d2f7c9e762bd8c199d0a025866184633168..841f07594df1dd636831b88046e525ae4c2735eb 100644
--- a/components/sessions/core/tab_restore_service_helper.cc
+++ b/components/sessions/core/tab_restore_service_helper.cc
@@ -51,8 +51,8 @@ TabRestoreServiceHelper::TabRestoreServiceHelper(
 }
 
 TabRestoreServiceHelper::~TabRestoreServiceHelper() {
-  FOR_EACH_OBSERVER(TabRestoreServiceObserver, observer_list_,
-                    TabRestoreServiceDestroyed(tab_restore_service_));
+  for (auto& observer : observer_list_)
+    observer.TabRestoreServiceDestroyed(tab_restore_service_);
 }
 
 void TabRestoreServiceHelper::AddObserver(
@@ -265,13 +265,13 @@ bool TabRestoreServiceHelper::IsRestoring() const {
 }
 
 void TabRestoreServiceHelper::NotifyTabsChanged() {
-  FOR_EACH_OBSERVER(TabRestoreServiceObserver, observer_list_,
-                    TabRestoreServiceChanged(tab_restore_service_));
+  for (auto& observer : observer_list_)
+    observer.TabRestoreServiceChanged(tab_restore_service_);
 }
 
 void TabRestoreServiceHelper::NotifyLoaded() {
-  FOR_EACH_OBSERVER(TabRestoreServiceObserver, observer_list_,
-                    TabRestoreServiceLoaded(tab_restore_service_));
+  for (auto& observer : observer_list_)
+    observer.TabRestoreServiceLoaded(tab_restore_service_);
 }
 
 void TabRestoreServiceHelper::AddEntry(std::unique_ptr<Entry> entry,