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

chrome/browser/ui/browser_command_controller.h

Index: chrome/browser/ui/browser_command_controller.h
diff --git a/chrome/browser/ui/browser_command_controller.h b/chrome/browser/ui/browser_command_controller.h
index bfba09e1daa495da9aff52ce2a8d7f1f2bcfd499..8a041050806e7ce2ced747e679be5fcb72e83769 100644
--- a/chrome/browser/ui/browser_command_controller.h
+++ b/chrome/browser/ui/browser_command_controller.h
@@ -56,6 +56,7 @@ class BrowserCommandController : public CommandUpdaterDelegate,
   // Notifies the controller that state has changed in one of the following
   // areas and it should update command states.
   void TabStateChanged();
+  void ZoomStateChanged();
   void ContentRestrictionsChanged();
   void FullscreenStateChanged();
   void PrintingStateChanged();
@@ -113,6 +114,9 @@ class BrowserCommandController : public CommandUpdaterDelegate,
   // Update commands whose state depends on the tab's state.
   void UpdateCommandsForTabState();
 
+  // Update Zoom commands based on zoom state.
+  void UpdateCommandsForZoomState();
+
   // Updates commands when the content's restrictions change.
   void UpdateCommandsForContentRestrictionState();