MacViews: Allow toolkit-views for "Global Error" bubbles.

chrome/browser/ui/cocoa/global_error_bubble_controller.h

 // Copyright (c) 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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_GLOBAL_ERROR_BUBBLE_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_GLOBAL_ERROR_BUBBLE_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include <memory>
 
 #include "base/memory/weak_ptr.h"
 #import "chrome/browser/ui/cocoa/base_bubble_controller.h"
 
 class Browser;
+class GlobalErrorBubbleViewBase;
 class GlobalErrorWithStandardBubble;
 @class GTMUILocalizerAndLayoutTweaker;
 @class GTMWidthBasedTweaker;
 
 namespace GlobalErrorBubbleControllerInternal {
 class Bridge;
 }
 
 // This is a bubble view shown from the app menu to display information
 // about a global error.
@@ skipping 12 matching lines @@
   IBOutlet GTMWidthBasedTweaker* buttonContainer_;
 }
 
 - (IBAction)onAccept:(id)sender;
 - (IBAction)onCancel:(id)sender;
 
 - (void)close;
 
 @end
 
+// Helper to show a toolkit-views global error bubble. Implemented in a views-
+// specific file.
+GlobalErrorBubbleViewBase* ShowViewsGlobalErrorBubbleOnCocoaBrowser(
+    NSPoint anchor,
+    Browser* browser,
+    const base::WeakPtr<GlobalErrorWithStandardBubble>& error);
+
 #endif  // CHROME_BROWSER_UI_COCOA_GLOBAL_ERROR_BUBBLE_CONTROLLER_H_