Make TabRestoreService::Entry noncopyable and fix up surrounding code.

chrome/browser/ui/cocoa/history_menu_bridge.mm

Index: chrome/browser/ui/cocoa/history_menu_bridge.mm
diff --git a/chrome/browser/ui/cocoa/history_menu_bridge.mm b/chrome/browser/ui/cocoa/history_menu_bridge.mm
index 82ac3853c6eb2becf5fd4f9750b4dc760498e5c8..f318fa77823a5c07149682fe17db7c21b0a0b3db 100644
--- a/chrome/browser/ui/cocoa/history_menu_bridge.mm
+++ b/chrome/browser/ui/cocoa/history_menu_bridge.mm
@@ -137,16 +137,15 @@ void HistoryMenuBridge::TabRestoreServiceChanged(
   NSInteger index = [menu indexOfItemWithTag:kRecentlyClosedTitle] + 1;
   NSUInteger added_count = 0;
 
-  for (sessions::TabRestoreService::Entries::const_iterator it =
-           entries.begin();
-       it != entries.end() && added_count < kRecentlyClosedCount; ++it) {
-    sessions::TabRestoreService::Entry* entry = *it;
-
+  for (const auto &entry : entries) {
+    if (added_count >= kRecentlyClosedCount) {
+      break;
+    }
     // If this is a window, create a submenu for all of its tabs.
-    if (entry->type == sessions::TabRestoreService::WINDOW) {
-      sessions::TabRestoreService::Window* entry_win =
-          (sessions::TabRestoreService::Window*)entry;
-      std::vector<sessions::TabRestoreService::Tab>& tabs = entry_win->tabs;
+    if (entry->type() == sessions::TabRestoreService::WINDOW) {
+      const auto& entry_win =
+          static_cast<sessions::TabRestoreService::Window&>(*entry);
+      const auto &tabs = entry_win.tabs;
       if (tabs.empty())
         continue;
 
@@ -155,7 +154,7 @@ void HistoryMenuBridge::TabRestoreServiceChanged(
       // things like the NTP are filtered out, which is done when the tab items
       // are actually created.
       HistoryItem* item = new HistoryItem();
-      item->session_id = entry_win->id;
+      item->session_id = entry_win.id;
 
       // Create the submenu.
       base::scoped_nsobject<NSMenu> submenu([[NSMenu alloc] init]);
@@ -178,9 +177,8 @@ void HistoryMenuBridge::TabRestoreServiceChanged(
 
       // Loop over the window's tabs and add them to the submenu.
       NSInteger subindex = [[submenu itemArray] count];
-      std::vector<sessions::TabRestoreService::Tab>::const_iterator it;
-      for (it = tabs.begin(); it != tabs.end(); ++it) {
-        HistoryItem* tab_item = HistoryItemForTab(*it);
+      for (const auto &tab : tabs) {
+        HistoryItem* tab_item = HistoryItemForTab(*tab);
         if (tab_item) {
           item->tabs.push_back(tab_item);
           AddItemToMenu(tab_item, submenu.get(), kRecentlyClosed + 1,
@@ -202,10 +200,9 @@ void HistoryMenuBridge::TabRestoreServiceChanged(
         [parent_item setSubmenu:submenu.get()];
         ++added_count;
       }
-    } else if (entry->type == sessions::TabRestoreService::TAB) {
-      sessions::TabRestoreService::Tab* tab =
-          static_cast<sessions::TabRestoreService::Tab*>(entry);
-      HistoryItem* item = HistoryItemForTab(*tab);
+    } else if (entry->type() == sessions::TabRestoreService::TAB) {
+      const auto &tab = static_cast<sessions::TabRestoreService::Tab&>(*entry);
+      HistoryItem* item = HistoryItemForTab(tab);
       if (item) {
         AddItemToMenu(item, menu, kRecentlyClosed, index++);
         ++added_count;