Implement BrowserWindowCocoa::IsToolbarShowing

chrome/browser/ui/cocoa/browser_window_controller.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 
 #include <cmath>
 #include <numeric>
 #include <utility>
 
@@ skipping 1851 matching lines @@
   }
 
   return touchBar_.get();
 }
 
 - (void)invalidateTouchBar {
   if ([[self window] respondsToSelector:@selector(setTouchBar:)])
     [[self window] performSelector:@selector(setTouchBar:) withObject:nil];
 }
 
+- (BOOL)isToolbarShowing {
+  return [fullscreenToolbarController_ mustShowFullscreenToolbar];
+}
+
 @end  // @implementation BrowserWindowController
 
 @implementation BrowserWindowController(Fullscreen)
 
 - (void)enterBrowserFullscreen {
   [self enterAppKitFullscreen];
 }
 
 - (void)updateUIForTabFullscreen:
     (ExclusiveAccessContext::TabFullscreenState)state {
@@ skipping 151 matching lines @@
 
 - (NSRect)savedRegularWindowFrame {
   return savedRegularWindowFrame_;
 }
 
 - (BOOL)isFullscreenTransitionInProgress {
   return enteringAppKitFullscreen_ || exitingAppKitFullscreen_;
 }
 
 @end  // @implementation BrowserWindowController(WindowType)