Add signal strength indicator icon to 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>
@@ skipping 52 matching lines @@
 }
 
 // Designated initializer.
 - (instancetype)initWithChooserTitle:(NSString*)chooserTitle
                    chooserController:
                        (std::unique_ptr<ChooserController>)chooserController;
 
 // Creates the title for the chooser.
 - (base::scoped_nsobject<NSTextField>)createChooserTitle:(NSString*)title;
 
+// Creates a table row view for the chooser.
+- (NSView*)createTableRowView:(NSInteger)rowIndex;
+
+// The height of a table row view.
+- (CGFloat)tableRowViewHeight:(NSInteger)row;
+
 // Creates a button with |title|.
 - (base::scoped_nsobject<NSButton>)createButtonWithTitle:(NSString*)title;
 
 // Creates the "Connect" button.
 - (base::scoped_nsobject<NSButton>)createConnectButton;
 
 // Creates the "Cancel" button.
 - (base::scoped_nsobject<NSButton>)createCancelButton;
 
 // Creates the separator.
@@ skipping 62 matching lines @@
 
 // Called when the chooser is closed.
 - (void)close;
 
 // Called when "Re-scan" button is pressed.
 - (void)onRescan:(id)sender;
 
 // Called when the "Get help" button is pressed.
 - (void)onHelpPressed:(id)sender;
 
+// Gets the image from table row view. For testing only.
+- (NSImageView*)tableRowViewImage:(NSInteger)row;
+
+// Gets the text from table row view. For testing only.
+- (NSTextField*)tableRowViewText:(NSInteger)row;
+
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_CHOOSER_CONTENT_VIEW_COCOA_H_