Add help link when Bluetooth adapter is off for WebBluetooth chooser

chrome/browser/ui/views/chooser_content_view.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 CHROME_BROWSER_UI_VIEWS_CHOOSER_CONTENT_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_CHOOSER_CONTENT_VIEW_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 56 matching lines @@
   views::Link* CreateExtraView();
   // Ownership of the view is passed to the caller.
   views::StyledLabel* CreateFootnoteView();
   void Accept();
   void Cancel();
   void Close();
   void UpdateTableView();
 
   views::TableView* table_view_for_test() const { return table_view_; }
   views::Throbber* throbber_for_test() const { return throbber_; }
+  views::Link* turn_adapter_off_help_for_test() const {
+    return turn_adapter_off_help_;
+  }
 
  private:
   std::unique_ptr<ChooserController> chooser_controller_;
-  views::TableView* table_view_;                // Weak.
-  views::Throbber* throbber_;                   // Weak.
-  views::Link* discovery_state_ = nullptr;      // Weak.
-  views::StyledLabel* styled_label_ = nullptr;  // Weak.
+  views::TableView* table_view_ = nullptr;        // Weak.
+  views::Throbber* throbber_ = nullptr;           // Weak.
+  views::Link* turn_adapter_off_help_ = nullptr;  // Weak.
+  views::Link* discovery_state_ = nullptr;        // Weak.
+  views::StyledLabel* styled_label_ = nullptr;    // Weak.
 
   DISALLOW_COPY_AND_ASSIGN(ChooserContentView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_CHOOSER_CONTENT_VIEW_H_