Disable zoom-in and zoom-out buttons in toolbar menu for a crashed page.

chrome/browser/ui/views/toolbar/app_menu.cc

Index: chrome/browser/ui/views/toolbar/app_menu.cc
diff --git a/chrome/browser/ui/views/toolbar/app_menu.cc b/chrome/browser/ui/views/toolbar/app_menu.cc
index 5cee86832ae3396e4b4c76212220bbd13796c8b4..95453a3f360a34b088bb0b0c1514cc95f612192b 100644
--- a/chrome/browser/ui/views/toolbar/app_menu.cc
+++ b/chrome/browser/ui/views/toolbar/app_menu.cc
@@ -22,6 +22,7 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/toolbar/app_menu_model.h"
@@ -660,19 +661,11 @@ class AppMenu::ZoomView : public AppMenuView {
 
   void UpdateZoomControls() {
     WebContents* selected_tab = GetActiveWebContents();
-    int zoom = 100;
-    if (selected_tab) {
-      auto zoom_controller =
-          ui_zoom::ZoomController::FromWebContents(selected_tab);
-      if (zoom_controller)
-        zoom = zoom_controller->GetZoomPercent();
-      increment_button_->SetEnabled(zoom <
-                                    selected_tab->GetMaximumZoomPercent());
-      decrement_button_->SetEnabled(zoom >
-                                    selected_tab->GetMinimumZoomPercent());
-    }
-    zoom_label_->SetText(
-        l10n_util::GetStringFUTF16Int(IDS_ZOOM_PERCENT, zoom));
+
+    increment_button_->SetEnabled(chrome::CanZoomIn(selected_tab));
+    decrement_button_->SetEnabled(chrome::CanZoomOut(selected_tab));
+    zoom_label_->SetText(l10n_util::GetStringFUTF16Int(
+        IDS_ZOOM_PERCENT, chrome::GetZoomPercent(selected_tab)));
 
     zoom_label_max_width_valid_ = false;
   }