Implement the new Sync Confirmation dialog on Linux and Windows.

chrome/browser/ui/views/profiles/signin_view_controller.cc

Index: chrome/browser/ui/views/profiles/signin_view_controller.cc
diff --git a/chrome/browser/ui/views/profiles/signin_view_controller.cc b/chrome/browser/ui/views/profiles/signin_view_controller.cc
index d5fd524c046bb92c98711587bfdaa4e0d65474a5..c7b5f1065b3a1036014c29d11e1ec3cebac29588 100644
--- a/chrome/browser/ui/views/profiles/signin_view_controller.cc
+++ b/chrome/browser/ui/views/profiles/signin_view_controller.cc
@@ -10,6 +10,7 @@
 #include "chrome/browser/signin/signin_promo.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/common/url_constants.h"
 #include "components/constrained_window/constrained_window_views.h"
 #include "components/signin/core/browser/signin_error_controller.h"
 #include "components/signin/core/common/profile_management_switches.h"
@@ -120,6 +121,15 @@ views::WebView* SigninViewController::CreateGaiaWebView(
   return web_view;
 }
 
+views::WebView* SigninViewController::CreateSyncConfirmationWebView(
+    Profile* profile) {
+  views::WebView* web_view = new views::WebView(profile);
+  web_view->LoadInitialURL(GURL(chrome::kChromeUISyncConfirmationURL));
+  web_view->SetPreferredSize(gfx::Size(450, 360));
+
+  return web_view;
+}
+
 void SigninViewController::ShowModalSignin(
     profiles::BubbleViewMode mode, Browser* browser) {
   CloseModalSignin();
@@ -139,6 +149,12 @@ void SigninViewController::ResetModalSigninDelegate() {
   modal_signin_delegate_ = nullptr;
 }
 
+void SigninViewController::ShowModalSyncConfirmationDialog(Browser* browser) {
+  CloseModalSignin();
+  modal_signin_delegate_ = new ModalSigninDelegate(
+      this, CreateSyncConfirmationWebView(browser->profile()), browser);
+}
+
 // static
 bool SigninViewController::ShouldShowModalSigninForMode(
     profiles::BubbleViewMode mode) {