Prefer unique_ptr to raw pointer to add child view.

Bug: 648382
Change-Id: I43525db40843528773cae2a675e6a28a244dc46d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1735228
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#687673}

chrome/browser/ui/views/overlay/close_image_button.cc

@@ -13,8 +13,8 @@
 
 namespace {
 
-const int kCloseButtonMargin = 8;
-const int kCloseButtonSize = 16;
+constexpr int kCloseButtonMargin = 8;
+constexpr int kCloseButtonSize = 16;
 
 constexpr SkColor kCloseIconColor = SK_ColorWHITE;
 

chrome/browser/ui/views/overlay/overlay_window_views.h

@@ -214,17 +214,17 @@ class OverlayWindowViews : public content::OverlayWindow,
   gfx::Size natural_size_;
 
   // Views to be shown.
-  std::unique_ptr<views::View> window_background_view_;
-  std::unique_ptr<views::View> video_view_;
-  std::unique_ptr<views::View> controls_scrim_view_;
-  std::unique_ptr<views::CloseImageButton> close_controls_view_;
-  std::unique_ptr<views::BackToTabImageButton> back_to_tab_controls_view_;
-  std::unique_ptr<views::TrackImageButton> previous_track_controls_view_;
-  std::unique_ptr<views::PlaybackImageButton> play_pause_controls_view_;
-  std::unique_ptr<views::TrackImageButton> next_track_controls_view_;
-  std::unique_ptr<views::MuteImageButton> mute_controls_view_;
-  std::unique_ptr<views::SkipAdLabelButton> skip_ad_controls_view_;
-  std::unique_ptr<views::ResizeHandleButton> resize_handle_view_;
+  views::View* window_background_view_ = nullptr;
+  views::View* video_view_ = nullptr;
+  views::View* controls_scrim_view_ = nullptr;
+  views::CloseImageButton* close_controls_view_ = nullptr;
+  views::BackToTabImageButton* back_to_tab_controls_view_ = nullptr;
+  views::TrackImageButton* previous_track_controls_view_ = nullptr;
+  views::PlaybackImageButton* play_pause_controls_view_ = nullptr;
+  views::TrackImageButton* next_track_controls_view_ = nullptr;
+  views::MuteImageButton* mute_controls_view_ = nullptr;
+  views::SkipAdLabelButton* skip_ad_controls_view_ = nullptr;
+  views::ResizeHandleButton* resize_handle_view_ = nullptr;
 #if defined(OS_CHROMEOS)
   std::unique_ptr<ash::RoundedCornerDecorator> decorator_;
 #endif