Implement a Menu Item to Hide the Toolbar in Fullscreen

chrome/browser/ui/cocoa/browser_window_cocoa.mm

Index: chrome/browser/ui/cocoa/browser_window_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_cocoa.mm b/chrome/browser/ui/cocoa/browser_window_cocoa.mm
index 3bfa7c34fbd938d4301c7b83e77d2fbeae830e11..d98c565ac7ef22d8f578e4c7a70afad5fa5ea25f 100644
--- a/chrome/browser/ui/cocoa/browser_window_cocoa.mm
+++ b/chrome/browser/ui/cocoa/browser_window_cocoa.mm
@@ -442,10 +442,18 @@ void BrowserWindowCocoa::UpdateFullscreenWithToolbar(bool with_toolbar) {
   [controller_ updateFullscreenWithToolbar:with_toolbar];
 }
 
+void BrowserWindowCocoa::ToggleFullscreenToolbar() {
+  [controller_ toggleFullscreenToolbar];
+}
+
 bool BrowserWindowCocoa::IsFullscreenWithToolbar() const {
   return IsFullscreen() && ![controller_ inPresentationMode];
 }
 
+bool BrowserWindowCocoa::ShouldHideFullscreenToolbar() const {
+  return [controller_ shouldHideFullscreenToolbar];
+}
+
 void BrowserWindowCocoa::ConfirmAddSearchProvider(
     TemplateURL* template_url,
     Profile* profile) {