Refactor: Untangle Mac's ExclusiveAccessContext from BrowserWindow

chrome/browser/ui/cocoa/browser_window_command_handler.mm

Index: chrome/browser/ui/cocoa/browser_window_command_handler.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_command_handler.mm b/chrome/browser/ui/cocoa/browser_window_command_handler.mm
index 32de3d180cefbdf683e149f20a15cbf0bfaf423b..8697e325dcb7b2e3b1055807088248ce28b2d013 100644
--- a/chrome/browser/ui/cocoa/browser_window_command_handler.mm
+++ b/chrome/browser/ui/cocoa/browser_window_command_handler.mm
@@ -53,7 +53,9 @@ void UpdateToggleStateWithTag(NSInteger tag, id item, NSWindow* window) {
   }
 
   if (tag == IDC_TOGGLE_FULLSCREEN_TOOLBAR) {
-    SetToggleState(browser->window()->ShouldHideFullscreenToolbar(), item);
+    BrowserWindowController* controller =
+        [browser->window()->GetNativeWindow() windowController];
+    SetToggleState([controller shouldHideFullscreenToolbar], item);
     return;
   }