Add help link when Bluetooth adapter is off for WebBluetooth chooser on Mac

chrome/browser/ui/cocoa/chooser_content_view_cocoa.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_COCOA_CHOOSER_CONTENT_VIEW_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_CHOOSER_CONTENT_VIEW_COCOA_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include <memory>
 
 #include "base/mac/scoped_nsobject.h"
 
 class ChooserContentViewController;
 class ChooserController;
 @class SpinnerView;
 
 // A chooser content view class that user can select an option.
 @interface ChooserContentViewCocoa : NSView {
  @private
   base::scoped_nsobject<NSTextField> titleView_;
+  base::scoped_nsobject<NSButton> adapterOffHelpButton_;
   base::scoped_nsobject<NSScrollView> scrollView_;
   base::scoped_nsobject<NSTableColumn> tableColumn_;
   base::scoped_nsobject<NSTableView> tableView_;
   base::scoped_nsobject<SpinnerView> spinner_;
   base::scoped_nsobject<NSTextField> status_;
   base::scoped_nsobject<NSButton> rescanButton_;
   base::scoped_nsobject<NSButton> connectButton_;
   base::scoped_nsobject<NSButton> cancelButton_;
   base::scoped_nsobject<NSBox> separator_;
   base::scoped_nsobject<NSTextField> message_;
@@ skipping 71 matching lines @@
 
 // Calculates the origin for the "Connect" button.
 - (NSPoint)calculateConnectButtonOrigin:(CGFloat)buttonRowHeight;
 
 // Calculates the origin for the "Cancel" button.
 - (NSPoint)calculateCancelButtonOrigin:(CGFloat)buttonRowHeight;
 
 // Updates the origin and size of the view.
 - (void)updateView;
 
+// Gets the adapter off help button.
+- (NSButton*)adapterOffHelpButton;
+
 // Gets the table view for the chooser.
 - (NSTableView*)tableView;
 
 // Gets the spinner.
 - (SpinnerView*)spinner;
 
 // Gets the status text field.
 - (NSTextField*)status;
 
 // Gets the "Re-scan" button.
@@ skipping 19 matching lines @@
 
 // Called when the "Connect" button is pressed.
 - (void)accept;
 
 // Called when the "Cancel" button is pressed.
 - (void)cancel;
 
 // Called when the chooser is closed.
 - (void)close;
 
+// Called when the adapter off help button is pressed.
+- (void)onAdapterOffHelp:(id)sender;
+
 // Called when "Re-scan" button is pressed.
 - (void)onRescan:(id)sender;
 
 // Called when the "Get help" button is pressed.
 - (void)onHelpPressed:(id)sender;
 
 // Update the color of the image and text in the table row view.
 - (void)updateContentRowColor;
 
 // Gets the image from table row view. For testing and internal use only.
 - (NSImageView*)tableRowViewImage:(NSInteger)row;
 
 // Gets the text from table row view. For testing and internal use only.
 - (NSTextField*)tableRowViewText:(NSInteger)row;
 
 // Gets the paired status from table row view. For testing and internal use
 // only.
 - (NSTextField*)tableRowViewPairedStatus:(NSInteger)row;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_CHOOSER_CONTENT_VIEW_COCOA_H_