Add help link when Bluetooth adapter is off for WebBluetooth chooser

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 86fb861334226b5736957d670c063868386b6ded..f4f43f686e054d68e0f9e0090bedde7eb6ae717b 100644
--- a/chrome/browser/ui/views/chooser_content_view.h
+++ b/chrome/browser/ui/views/chooser_content_view.h
@@ -74,13 +74,17 @@ class ChooserContentView : public views::View,
 
   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);
 };