mac: Fix a logic error in presentation_mode_controller.

chrome/browser/ui/cocoa/presentation_mode_controller.mm

Index: chrome/browser/ui/cocoa/presentation_mode_controller.mm
diff --git a/chrome/browser/ui/cocoa/presentation_mode_controller.mm b/chrome/browser/ui/cocoa/presentation_mode_controller.mm
index d92fb7b6ad87b15d77c40693081c97a4989c9b76..a80ceb1d40c38bf5dca654caeebe7c983080ec3c 100644
--- a/chrome/browser/ui/cocoa/presentation_mode_controller.mm
+++ b/chrome/browser/ui/cocoa/presentation_mode_controller.mm
@@ -180,8 +180,8 @@ OSStatus MenuBarRevealHandler(EventHandlerCallRef handler,
 - (void)showActiveWindowUI;
 - (void)hideActiveWindowUI;
 
-// In Immersive Fullscreen, the menubar is visible iff. toolbarFraction_ >=
-// 1.0.
+// Whether the menu bar should be shown in immersive fullscreen for the screen
+// that contains the window.
 - (BOOL)shouldShowMenubarInImmersiveFullscreen;
 
 @end
@@ -745,7 +745,7 @@ OSStatus MenuBarRevealHandler(EventHandlerCallRef handler,
 }
 
 - (BOOL)shouldShowMenubarInImmersiveFullscreen {
-  return toolbarFraction_ >= 1.0;
+  return [self doesScreenHaveMenuBar] && toolbarFraction_ > 0.99;
 }
 
 @end