Allow dialogs to use a custom View as their title.

ui/views/bubble/bubble_dialog_delegate.h

 // Copyright 2016 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 UI_VIEWS_BUBBLE_BUBBLE_DIALOG_DELEGATE_H_
 #define UI_VIEWS_BUBBLE_BUBBLE_DIALOG_DELEGATE_H_
 
 #include <memory>
 
 #include "base/gtest_prod_util.h"
@@ skipping 39 matching lines @@
   const char* GetClassName() const override;
 
   // WidgetObserver overrides:
   void OnWidgetDestroying(Widget* widget) override;
   void OnWidgetVisibilityChanging(Widget* widget, bool visible) override;
   void OnWidgetVisibilityChanged(Widget* widget, bool visible) override;
   void OnWidgetActivationChanged(Widget* widget, bool active) override;
   void OnWidgetBoundsChanged(Widget* widget,
                              const gfx::Rect& new_bounds) override;
 
+  // View:
+  void AddedToWidget() override;

[sky, 2017/06/09 23:49:16]

Move up to WidgetDelegateView section above.

[Bret, 2017/06/15 22:20:34]

Done.

+
   bool close_on_deactivate() const { return close_on_deactivate_; }
   void set_close_on_deactivate(bool close) { close_on_deactivate_ = close; }
 
   View* GetAnchorView() const;
   Widget* anchor_widget() const { return anchor_widget_; }
 
   // The anchor rect is used in the absence of an assigned anchor view.
   const gfx::Rect& anchor_rect() const { return anchor_rect_; }
 
   BubbleBorder::Arrow arrow() const { return arrow_; }
@@ skipping 46 matching lines @@
   void SetArrowPaintType(BubbleBorder::ArrowPaintType paint_type);
 
   // Sets the bubble border interior thickness.
   void SetBorderInteriorThickness(int thickness);
 
   // Call this method when the anchor bounds have changed to reposition the
   // bubble. The bubble is automatically repositioned when the anchor view
   // bounds change as a result of the widget's bounds changing.
   void OnAnchorBoundsChanged();
 
+  // Called when the title of the dialog needs to be updated.
+  void PropagateUpdateTitleView(View* title_view);
+
  protected:
   BubbleDialogDelegateView();
   BubbleDialogDelegateView(View* anchor_view, BubbleBorder::Arrow arrow);
 
   // Get bubble bounds from the anchor rect and client view's preferred size.
   virtual gfx::Rect GetBubbleBounds();
 
   // Return a FontList to use for the title of the bubble.
   // (The default is MediumFont).
   virtual const gfx::FontList& GetTitleFontList() const;
 
+  // Returns a custom view to use as the title of the dialog.
+  virtual View* CreateTitleView();
+
+  // Called when the title of the dialog needs to be updated and a custom title
+  // view is being used.
+  virtual void UpdateTitleView(View* view,
+                               base::string16 title_text,
+                               bool visible) {}
+
   // View overrides:
   void OnNativeThemeChanged(const ui::NativeTheme* theme) override;
 
   // Perform view initialization on the contents for bubble sizing.
   virtual void Init();
 
   // Sets the anchor view or rect and repositions the bubble. Note that if a
   // valid view gets passed, the anchor rect will get ignored. If the view gets
   // deleted, but no new view gets set, the last known anchor postion will get
   // returned.
@@ skipping 62 matching lines @@
 
   // Parent native window of the bubble.
   gfx::NativeView parent_window_;
 
   DISALLOW_COPY_AND_ASSIGN(BubbleDialogDelegateView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_BUBBLE_BUBBLE_DELEGATE2_H_