Introduce InfoBarTabService API.

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"
 #include "base/utf_string_conversions.h"
+#include "chrome/browser/infobars/infobar_tab_helper.h"
 #include "chrome/browser/media/media_stream_devices_menu_model.h"
 #include "chrome/browser/ui/cocoa/hover_close_button.h"
 #include "chrome/browser/ui/cocoa/infobars/infobar.h"
 #import "chrome/browser/ui/cocoa/infobars/infobar_utilities.h"
 #include "chrome/browser/ui/media_stream_infobar_delegate.h"
 #include "grit/generated_resources.h"
 #import "third_party/GTM/AppKit/GTMUILocalizerAndLayoutTweaker.h"
 #include "ui/base/l10n/l10n_util.h"
 
 using InfoBarUtilities::CreateLabel;
 using InfoBarUtilities::MoveControl;
 using InfoBarUtilities::VerifyControlOrderAndSpacing;
 using l10n_util::GetNSStringWithFixup;
 
-InfoBar* MediaStreamInfoBarDelegate::CreateInfoBar(InfoBarTabHelper* owner) {
+InfoBar* MediaStreamInfoBarDelegate::CreateInfoBar(InfoBarTabService* owner) {
+  InfoBarTabHelper* helper = (InfoBarTabHelper*)owner;
   MediaStreamInfoBarController* infobar_controller =

[erikwright (departed), 2012/08/20 05:54:46]

Again, perhaps converting MediaStreamInfoBarController and removing the cast
would be worthwhile.

[Jói, 2012/08/20 12:30:15]

Done.

       [[MediaStreamInfoBarController alloc] initWithDelegate:this
-                                                       owner:owner];
+                                                       owner:helper];
   return new InfoBar(infobar_controller, this);
 }
 
 
 @interface MediaStreamInfoBarController(Private)
 
 // Adds text for all buttons and text fields.
 - (void)setLabelTexts;
 
 // Populates the device menu with device id:s.
@@ skipping 219 matching lines @@
     [[[deviceMenu_ menu] itemAtIndex:0] setTitle:@""];
     [[deviceMenu_ cell] setArrowPosition:NSPopUpArrowAtCenter];
   }
 }
 
 - (void)didChangeFrame:(NSNotification*)notification {
   [self arrangeInfobarLayout];
 }
 
 @end  // implementation MediaStreamInfoBarController