Issue 32919: Update the Zoom NSMenuItems (Zoom-In/Zoom-out/Actual-Size) when the zoom state changes.

chrome/browser/ui/browser_commands.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/browser_commands.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 556 matching lines @@
     // See http://crbug.com/6380.
     b->tab_strip_model()->GetActiveWebContents()->RestoreFocus();
   }
 }
 
 void CloseTab(Browser* browser) {
   content::RecordAction(UserMetricsAction("CloseTab_Accelerator"));
   browser->tab_strip_model()->CloseSelectedTabs();
 }
 
+bool CanZoomIn(content::WebContents* contents) {
+  bool dummy = false;
+  return contents->GetZoomPercent(&dummy, &dummy) !=
+          contents->GetMaximumZoomPercent() + 1;

[Alexei Svitkine (slow), 2014/06/16 17:41:46]

Nit: indent is wrong, same below.

+}
+
+bool CanZoomOut(content::WebContents* contents) {
+  bool dummy = false;
+  return contents->GetZoomPercent(&dummy, &dummy) !=
+          contents->GetMinimumZoomPercent();
+}
+
+bool ActualSize(content::WebContents* contents) {
+  bool dummy = false;
+  return contents->GetZoomPercent(&dummy, &dummy) != 100.0f;
+}
+
 void RestoreTab(Browser* browser) {
   content::RecordAction(UserMetricsAction("RestoreTab"));
   TabRestoreService* service =
       TabRestoreServiceFactory::GetForProfile(browser->profile());
   if (service)
     service->RestoreMostRecentEntry(browser->tab_restore_service_delegate(),
                                     browser->host_desktop_type());
 }
 
 TabStripModelDelegate::RestoreTabType GetRestoreTabType(
@@ skipping 673 matching lines @@
                                           browser->profile(),
                                           browser->host_desktop_type()));
   app_browser->tab_strip_model()->AppendWebContents(contents, true);
 
   contents->GetMutableRendererPrefs()->can_accept_load_drops = false;
   contents->GetRenderViewHost()->SyncRendererPrefs();
   app_browser->window()->Show();
 }
 
 }  // namespace chrome