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"
 #include "base/strings/string16.h"
 #include "chrome/browser/chooser_controller/chooser_controller.h"
 #include "ui/base/models/table_model.h"
 #include "ui/views/controls/link_listener.h"
 #include "ui/views/controls/styled_label_listener.h"
 #include "ui/views/view.h"
 
 namespace views {
 class Link;
 class StyledLabel;
 class TableView;
 class TableViewObserver;
 class Throbber;
 }
 
 // A bubble or dialog view for choosing among several options in a table.
 // Used for WebUSB/WebBluetooth device selection for Chrome and extensions.
+//
+// TODO(juncai): change ChooserContentView class name to be more specific.
+// https://crbug.com/651568
 class ChooserContentView : public views::View,
                            public ui::TableModel,
                            public ChooserController::View,
                            public views::LinkListener,
                            public views::StyledLabelListener {
  public:
   ChooserContentView(views::TableViewObserver* table_view_observer,
                      std::unique_ptr<ChooserController> chooser_controller);
   ~ChooserContentView() override;
 
   // views::View:
   gfx::Size GetPreferredSize() const override;
+  void Layout() override;
 
   // ui::TableModel:
   int RowCount() override;
   base::string16 GetText(int row, int column_id) override;
   void SetObserver(ui::TableModelObserver* observer) override;
   gfx::ImageSkia GetIcon(int row) override;
 
   // ChooserController::View:
   void OnOptionsInitialized() override;
   void OnOptionAdded(size_t index) override;
@@ skipping 17 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::View* table_parent_ = 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_