MacViews: Consolidate flags. Just use --secondary-ui-md to enable MacViews.

chrome/browser/ui/browser_dialogs.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_BROWSER_DIALOGS_H_
 #define CHROME_BROWSER_UI_BROWSER_DIALOGS_H_
 
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
 #include "build/build_config.h"
 #include "chrome/browser/ui/bookmarks/bookmark_editor.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/native_widget_types.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/arc/intent_helper/arc_navigation_throttle.h"
 #endif  // OS_CHROMEOS
 
 class Browser;
 class ContentSettingBubbleModel;
 class GURL;
 class LoginHandler;
 class Profile;
 
-namespace base {
-struct Feature;
-}
-
 namespace bookmarks {
 class BookmarkBubbleObserver;
 }
 
 namespace content {
 class BrowserContext;
 class ColorChooser;
 class WebContents;
 }
 
@@ skipping 17 matching lines @@
 namespace task_manager {
 class TaskManagerTableModel;
 }
 
 namespace ui {
 class WebDialogDelegate;
 }
 
 namespace chrome {
 
-#if defined(OS_MACOSX)
-// Makes ToolkitViewsDialogsEnabled() available to chrome://flags.
-extern const base::Feature kMacViewsNativeDialogs;
-
-// Makes ToolkitViewsWebUIDialogsEnabled() available to chrome://flags.
-extern const base::Feature kMacViewsWebUIDialogs;
-#endif  // OS_MACOSX
-
 // Shows or hides the Task Manager. |browser| can be NULL when called from Ash.
 // Returns a pointer to the underlying TableModel, which can be ignored, or used
 // for testing.
 task_manager::TaskManagerTableModel* ShowTaskManager(Browser* browser);
 void HideTaskManager();
 
 #if !defined(OS_MACOSX)
 // Creates and shows an HTML dialog with the given delegate and context.
 // The window is automatically destroyed when it is closed.
 // Returns the created window.
@@ skipping 28 matching lines @@
     Profile* profile,
     const extensions::Extension* app,
     const base::Callback<void(bool /* created */)>& close_callback);
 
 // Shows a color chooser that reports to the given WebContents.
 content::ColorChooser* ShowColorChooser(content::WebContents* web_contents,
                                         SkColor initial_color);
 
 #if defined(OS_MACOSX)
 
-// For Mac, returns true if Chrome should show an equivalent toolkit-views based
-// dialog instead of a native-looking Cocoa dialog.
-bool ToolkitViewsDialogsEnabled();
-
-// For Mac, returns true if Chrome should show an equivalent toolkit-views based
-// dialog instead of a WebUI-styled Cocoa dialog.
-bool ToolkitViewsWebUIDialogsEnabled();
-
 // Shows a Views website settings bubble at the given anchor point.
 void ShowWebsiteSettingsBubbleViewsAtPoint(
     const gfx::Point& anchor_point,
     Profile* profile,
     content::WebContents* web_contents,
     const GURL& virtual_url,
     const security_state::SecurityInfo& security_info);
 
 // Show a Views bookmark bubble at the given point. This occurs when the
 // bookmark star is clicked or "Bookmark This Page..." is selected from a menu
@@ skipping 58 matching lines @@
 using BubbleShowPtr =
     void (*)(content::WebContents*,
              const std::vector<arc::ArcNavigationThrottle::AppInfo>&,
              const IntentPickerResponse&);
 
 BubbleShowPtr ShowIntentPickerBubble();
 
 #endif  // OS_CHROMEOS
 
 #endif  // CHROME_BROWSER_UI_BROWSER_DIALOGS_H_