remove an unnecessary divider line

chrome/browser/ui/cocoa/infobars/media_stream_infobar_controller.mm

 // Copyright (c) 2012 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.
 
 #import "chrome/browser/ui/cocoa/infobars/media_stream_infobar_controller.h"
 
 #import <Cocoa/Cocoa.h>
 #include <string>
 
 #import "base/sys_string_conversions.h"
@@ skipping 210 matching lines @@
 
   // Add title item.
   NSString* menuTitle = GetNSStringWithFixup(
       IDS_MEDIA_CAPTURE_DEVICES_MENU_TITLE);
   NSMenuItem* titleItem =
       [menu addItemWithTitle:menuTitle
                       action:NULL
                keyEquivalent:@""];
   [titleItem setState:NSOffState];
 
-  [menu addItem:[NSMenuItem separatorItem]];
-
   // Add all capture devices.
   for (int i = 0; i < deviceMenuModel_->GetItemCount(); ++i) {
     if (deviceMenuModel_->GetCommandIdAt(i) == -1) {
       [menu addItem:[NSMenuItem separatorItem]];
     } else {
       NSString* title =
           base::SysUTF16ToNSString(deviceMenuModel_->GetLabelAt(i));
       NSMenuItem* item = [menu addItemWithTitle:title
                                          action:@selector(deviceMenuChanged:)
                                   keyEquivalent:@""];
@@ skipping 18 matching lines @@
     [[[deviceMenu_ menu] itemAtIndex:0] setTitle:@""];
     [[deviceMenu_ cell] setArrowPosition:NSPopUpArrowAtCenter];
   }
 }
 
 - (void)didChangeFrame:(NSNotification*)notification {
   [self arrangeInfobarLayout];
 }
 
 @end  // implementation MediaStreamInfoBarController