Modify WebBluetooth chooser based on UI review feedback

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 16 matching lines @@
   base::scoped_nsobject<SpinnerView> spinner_;
   base::scoped_nsobject<NSButton> connectButton_;
   base::scoped_nsobject<NSButton> cancelButton_;
   base::scoped_nsobject<NSBox> separator_;
   base::scoped_nsobject<NSButton> helpButton_;
   base::scoped_nsobject<NSTextField> scanningMessage_;
   base::scoped_nsobject<NSTextField> wordConnector_;
   base::scoped_nsobject<NSButton> rescanButton_;
   std::unique_ptr<ChooserController> chooserController_;
   std::unique_ptr<ChooserContentViewController> chooserContentViewController_;
+  CGFloat separatorOriginY_;
 }
 
 // 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;
 
@@ skipping 82 matching lines @@
 // 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_