The updated (simplified) look of set-as-default dialog on Windows8.

chrome/browser/ui/webui/set_as_default_browser_ui.cc

Index: chrome/browser/ui/webui/set_as_default_browser_ui.cc
diff --git a/chrome/browser/ui/webui/set_as_default_browser_ui.cc b/chrome/browser/ui/webui/set_as_default_browser_ui.cc
index 57f514306cdd95fd3a3f0c1f606c460943a15097..dfceca3c6b4b9c976607cde34dcd563383a5cffc 100644
--- a/chrome/browser/ui/webui/set_as_default_browser_ui.cc
+++ b/chrome/browser/ui/webui/set_as_default_browser_ui.cc
@@ -50,8 +50,6 @@ ChromeWebUIDataSource* CreateSetAsDefaultBrowserUIHTMLSource() {
                                   IDS_METRO_FLOW_DESCRIPTION);
   data_source->AddLocalizedString("flowNext",
                                   IDS_METRO_FLOW_SET_DEFAULT);
-  data_source->AddLocalizedString("flowCancel",
-                                  IDS_METRO_FLOW_SET_DEFAULT_CANCEL);
   data_source->set_json_path("strings.js");
   data_source->add_resource_path("set_as_default_browser.js",
       IDR_SET_AS_DEFAULT_BROWSER_JS);
@@ -83,9 +81,6 @@ class SetAsDefaultBrowserHandler
   // Handler for the 'Next' (or 'make Chrome the Metro browser') button.
   void HandleLaunchSetDefaultBrowserFlow(const ListValue* args);
 
-  // Handler for the 'No, thanks' (Cancel) button.
-  void HandleReturnToBrowser(const ListValue* args);
-
   // Close this web ui.
   void ConcludeInteraction();
 
@@ -116,10 +111,6 @@ void SetAsDefaultBrowserHandler::RegisterMessages() {
       "SetAsDefaultBrowser:LaunchSetDefaultBrowserFlow",
       base::Bind(&SetAsDefaultBrowserHandler::HandleLaunchSetDefaultBrowserFlow,
                  base::Unretained(this)));
-  web_ui()->RegisterMessageCallback(
-      "SetAsDefaultBrowser:ReturnToBrowser",
-      base::Bind(&SetAsDefaultBrowserHandler::HandleReturnToBrowser,
-                 base::Unretained(this)));
 }
 
 void SetAsDefaultBrowserHandler::SetDefaultWebClientUIState(
@@ -158,10 +149,6 @@ void SetAsDefaultBrowserHandler::HandleLaunchSetDefaultBrowserFlow(
   default_browser_worker_->StartSetAsDefault();
 }
 
-void SetAsDefaultBrowserHandler::HandleReturnToBrowser(const ListValue* args) {
-  ConcludeInteraction();
-}
-
 void SetAsDefaultBrowserHandler::ConcludeInteraction() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   WebContents* contents = web_ui()->GetWebContents();