Eliminate InfoBarTabHelper. Make InfoBarService a concrete class.

chrome/browser/ui/gtk/infobars/infobar_gtk.cc

 // 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.
 
 #include "chrome/browser/ui/gtk/infobars/infobar_gtk.h"
 
 #include "base/debug/trace_event.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 47 matching lines @@
       signals_(new ui::GtkSignalRegistrar) {
 }
 
 InfoBarGtk::~InfoBarGtk() {
 }
 
 void InfoBarGtk::InitWidgets() {
   DCHECK(owner());
   DCHECK(!theme_service_);
   theme_service_ = GtkThemeService::GetFrom(Profile::FromBrowserContext(
-      owner()->GetWebContents()->GetBrowserContext()));
+      owner()->web_contents()->GetBrowserContext()));
 
   // Create |hbox_| and pad the sides.
   hbox_ = gtk_hbox_new(FALSE, kElementPadding);
 
   // Make the whole infor bar horizontally shrinkable.
   gtk_widget_set_size_request(hbox_, 0, -1);
 
   GtkWidget* padding = gtk_alignment_new(0, 0, 1, 1);
   gtk_alignment_set_padding(GTK_ALIGNMENT(padding),
                             0, 0, kLeftPadding, kRightPadding);
@@ skipping 249 matching lines @@
                          const content::NotificationDetails& details) {
   DCHECK(widget());
   UpdateBorderColor();
 }
 
 void InfoBarGtk::OnChildSizeRequest(GtkWidget* expanded,
                                     GtkWidget* child,
                                     GtkRequisition* requisition) {
   requisition->height = -1;
 }