Convert some more view methods to the ui/views style.

chrome/browser/chromeos/notifications/balloon_view.cc

 // Copyright (c) 2011 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/chromeos/notifications/balloon_view.h"
 
 #include <vector>
 
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
@@ skipping 312 matching lines @@
   return balloon_->notification().notification_id() ==
       notification.notification_id();
 }
 
 void BalloonViewImpl::Activated() {
   if (!control_view_host_.get())
     return;
 
   // Get the size of Control View.
   gfx::Size size =
-      control_view_host_->GetRootView()->GetChildViewAt(0)->GetPreferredSize();
+      control_view_host_->GetRootView()->child_at(0)->GetPreferredSize();
   control_view_host_->Show();
   control_view_host_->SetBounds(
       gfx::Rect(width() - size.width() - kControlViewRightMargin,
                 kControlViewTopMargin,
                 size.width(), size.height()));
 }
 
 void BalloonViewImpl::Deactivated() {
   if (control_view_host_.get()) {
     control_view_host_->Hide();
@@ skipping 15 matching lines @@
   service->DenyPermission(balloon_->notification().origin_url());
 }
 
 gfx::NativeView BalloonViewImpl::GetParentNativeView() {
   RenderWidgetHostView* view = html_contents_->render_view_host()->view();
   DCHECK(view);
   return view->GetNativeView();
 }
 
 }  // namespace chromeos