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

chrome/browser/ui/views/frame/browser_frame.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/ui/views/frame/browser_frame.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/themes/theme_service.h"
 #include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/browser/ui/browser_list.h"
@@ skipping 54 matching lines @@
   browser_frame_view_->UpdateThrobber(running);
 }
 
 views::View* BrowserFrame::GetFrameView() const {
   return browser_frame_view_;
 }
 
 void BrowserFrame::TabStripDisplayModeChanged() {
   if (GetRootView()->has_children()) {
     // Make sure the child of the root view gets Layout again.
-    GetRootView()->GetChildViewAt(0)->InvalidateLayout();
+    GetRootView()->child_at(0)->InvalidateLayout();
   }
   GetRootView()->Layout();
   native_browser_frame_->TabStripDisplayModeChanged();
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // BrowserFrameWin, views::Window overrides:
 
 bool BrowserFrame::IsMaximized() const {
 #if defined(OS_CHROMEOS)
@@ skipping 40 matching lines @@
     // active on the users desktop, then none of the windows contained in the
     // remote desktop will be activated.  However, NativeWidgetWin::Activate()
     // will still bring this browser window to the foreground.  We explicitly
     // set ourselves as the last active browser window to ensure that we get
     // treated as such by the rest of Chrome.
     BrowserList::SetLastActive(browser_view_->browser());
   }
   Widget::OnNativeWidgetActivationChanged(active);
 }