Fix the Web Bluetooth chooser when it is used on Chrome apps on non-Mac

chrome/browser/ui/views/chooser_content_view.h

Index: chrome/browser/ui/views/chooser_content_view.h
diff --git a/chrome/browser/ui/views/chooser_content_view.h b/chrome/browser/ui/views/chooser_content_view.h
index d277104b45cdfcd26f07dda91a006e27d40b2cf6..d7c8d990fe7e2d26d7b1ee8756f8475e00e3df6c 100644
--- a/chrome/browser/ui/views/chooser_content_view.h
+++ b/chrome/browser/ui/views/chooser_content_view.h
@@ -88,6 +88,10 @@ class ChooserContentView : public views::View,
   views::View* table_parent_ = nullptr;  // Weak.
   views::StyledLabel* turn_adapter_off_help_ = nullptr;  // Weak.
   views::Throbber* throbber_ = nullptr;  // Weak.
+  // |footnote_link_ptr_| will transfer its ownership of the pointer to its
+  // caller when CreateFootnoteView() is called.
+  std::unique_ptr<views::StyledLabel> footnote_link_ptr_;
+  // |footnote_link_| holds a weak pointer of |footnote_link_ptr_|.
   views::StyledLabel* footnote_link_ = nullptr;  // Weak.
   base::string16 help_text_;
   base::string16 help_and_scanning_text_;