Get rid of the last RenderViewHostDelegate usage in chrome.

chrome/browser/ui/webui/sync_setup_handler.cc

Index: chrome/browser/ui/webui/sync_setup_handler.cc
===================================================================
--- chrome/browser/ui/webui/sync_setup_handler.cc	(revision 138434)
+++ chrome/browser/ui/webui/sync_setup_handler.cc	(working copy)
@@ -31,13 +31,14 @@
 #include "chrome/common/net/gaia/gaia_constants.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/render_view_host.h"
-#include "content/public/browser/render_view_host_delegate.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_contents_delegate.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "grit/locale_settings.h"
 #include "ui/base/l10n/l10n_util.h"
 
+using content::WebContents;
 using l10n_util::GetStringFUTF16;
 using l10n_util::GetStringUTF16;
 
@@ -957,7 +958,8 @@
 
 void SyncSetupHandler::FocusUI() {
   DCHECK(IsActiveLogin());
-  web_ui()->GetWebContents()->GetRenderViewHost()->GetDelegate()->Activate();
+  WebContents* web_contents = web_ui()->GetWebContents();
+  web_contents->GetDelegate()->ActivateContents(web_contents);
 }
 
 void SyncSetupHandler::CloseUI() {