Views - init less stuff in tabless browsers.

chrome/browser/ui/views/toolbar/toolbar_view.h

 // Copyright 2013 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_VIEWS_TOOLBAR_TOOLBAR_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_VIEW_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
@@ skipping 22 matching lines @@
 }
 
 // The Browser Window's toolbar.
 class ToolbarView : public views::AccessiblePaneView,
                     public views::MenuButtonListener,
                     public ui::AcceleratorProvider,
                     public LocationBarView::Delegate,
                     public content::NotificationObserver,
                     public CommandObserver,
                     public views::ButtonListener,
-                    public views::WidgetObserver,
                     public views::ViewTargeterDelegate,
                     public AppMenuBadgeController::Delegate {
  public:
   // The view class name.
   static const char kViewClassName[];
 
   explicit ToolbarView(Browser* browser);
   ~ToolbarView() override;
 
   // Create the contents of the Browser Toolbar.
@@ skipping 25 matching lines @@
   views::View* GetSaveCreditCardBubbleAnchor();
 
   // Returns the view to which the Translate bubble should be anchored.
   views::View* GetTranslateBubbleAnchor();
 
   // Adds |anchor_view| as an observer of |bubble_widget| to track its
   // visibility.
   void OnBubbleCreatedForAnchor(views::View* anchor_view,
                                 views::Widget* bubble_widget);
 
-  // Executes |command| registered by |extension|.
-  void ExecuteExtensionCommand(const extensions::Extension* extension,
-                               const extensions::Command& command);
-
   // Returns the maximum width the browser actions container can have.
   int GetMaxBrowserActionsWidth() const;
 
   // Accessors.
   Browser* browser() const { return browser_; }
   BrowserActionsContainer* browser_actions() const { return browser_actions_; }
   ReloadButton* reload_button() const { return reload_; }
   LocationBarView* location_bar() const { return location_bar_; }
   AppMenuButton* app_menu_button() const { return app_menu_button_; }
   HomeButton* home_button() const { return home_; }
@@ skipping 25 matching lines @@
       const GURL& url,
       const security_state::SecurityStateModel::SecurityInfo& security_info)
       override;
 
   // CommandObserver:
   void EnabledStateChangedForCommand(int id, bool enabled) override;
 
   // views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
-  // views::WidgetObserver:
-  void OnWidgetActivationChanged(views::Widget* widget, bool active) override;
-
   // content::NotificationObserver:
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
   // ui::AcceleratorProvider:
   bool GetAcceleratorForCommandId(int command_id,
                                   ui::Accelerator* accelerator) override;
 
   // views::View:
@@ skipping 49 matching lines @@
   void ShowCriticalNotification();
 
   // Shows the outdated install notification bubble against the app menu.
   // |auto_update_enabled| is set to true when auto-upate is on.
   void ShowOutdatedInstallNotification(bool auto_update_enabled);
 
   void OnShowHomeButtonChanged();
 
   int content_shadow_height() const;
 
-  // Controls
+  // Controls. Most of these can be null, e.g. in popup windows. Only
+  // |location_bar_| is guaranteed to exist.
   BackButton* back_;
   ToolbarButton* forward_;
   ReloadButton* reload_;
   HomeButton* home_;
   LocationBarView* location_bar_;
   BrowserActionsContainer* browser_actions_;
   AppMenuButton* app_menu_button_;
+
   Browser* browser_;
 
   AppMenuBadgeController badge_controller_;
 
   // Controls whether or not a home button should be shown on the toolbar.
   BooleanPrefMember show_home_button_;
 
   // The display mode used when laying out the toolbar.
-  DisplayMode display_mode_;
+  const DisplayMode display_mode_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ToolbarView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_VIEW_H_