Allow dialogs to use a custom View as their title.

ui/views/bubble/bubble_dialog_delegate.cc

 // 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.
 
 #include "ui/views/bubble/bubble_dialog_delegate.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "build/build_config.h"
 #include "ui/accessibility/ax_node_data.h"
@@ skipping 140 matching lines @@
     GetWidget()->Close();
 }
 
 void BubbleDialogDelegateView::OnWidgetBoundsChanged(
     Widget* widget,
     const gfx::Rect& new_bounds) {
   if (GetBubbleFrameView() && anchor_widget() == widget)
     SizeToContents();
 }
 
+void BubbleDialogDelegateView::AddedToWidget() {
+  View* title_view = CreateTitleView();
+  if (title_view) {
+    GetBubbleFrameView()->SetTitleView(title_view);
+    PropagateUpdateTitleView(title_view);
+  }
+}
+
 View* BubbleDialogDelegateView::GetAnchorView() const {
   return anchor_view_tracker_->view();
 }
 
 gfx::Rect BubbleDialogDelegateView::GetAnchorRect() const {
   if (!GetAnchorView())
     return anchor_rect_;
 
   anchor_rect_ = GetAnchorView()->GetBoundsInScreen();
   anchor_rect_.Inset(anchor_view_insets_);
@@ skipping 63 matching lines @@
       adjust_if_offscreen_ && !anchor_minimized);
 }
 
 const gfx::FontList& BubbleDialogDelegateView::GetTitleFontList() const {
   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
   if (ui::MaterialDesignController::IsSecondaryUiMaterial())
     return rb.GetFontListWithDelta(ui::kTitleFontSizeDelta);
   return rb.GetFontList(ui::ResourceBundle::MediumFont);
 }
 
+View* BubbleDialogDelegateView::CreateTitleView() {
+  return nullptr;
+}
+
+void BubbleDialogDelegateView::PropagateUpdateTitleView(View* title_view) {
+  if (title_view)
+    UpdateTitleView(title_view, GetWindowTitle(), ShouldShowWindowTitle());
+}
+
 void BubbleDialogDelegateView::OnNativeThemeChanged(
     const ui::NativeTheme* theme) {
   UpdateColorsFromTheme(theme);
 }
 
 void BubbleDialogDelegateView::Init() {}
 
 void BubbleDialogDelegateView::SetAnchorView(View* anchor_view) {
   // When the anchor view gets set the associated anchor widget might
   // change as well.
@@ skipping 63 matching lines @@
   // http://crbug.com/474622 for details.
   if (widget == GetWidget() && visible) {
     ui::AXNodeData node_data;
     GetAccessibleNodeData(&node_data);
     if (node_data.role == ui::AX_ROLE_ALERT_DIALOG)
       NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
   }
 }
 
 }  // namespace views