Clear initial focus in Sync Confirmation dialog.

chrome/browser/ui/webui/signin/sync_confirmation_handler.cc

 // Copyright 2015 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/webui/signin/sync_confirmation_handler.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "chrome/browser/profiles/profile_avatar_icon_util.h"
@@ skipping 103 matching lines @@
     AccountTrackerServiceFactory::GetForProfile(profile)->AddObserver(this);
   else
     SetUserImageURL(primary_account_info.picture_url);
 
   double height;
   bool success = args->GetDouble(0, &height);
   DCHECK(success);
 
   browser->signin_view_controller()->delegate()->ResizeNativeView(
       static_cast<int>(height));
+
+  // After the dialog is shown, some platforms might have an element focused.
+  // To be consistent, clear the focused element on all platforms.
+  // TODO(anthonyvd): Figure out why this is needed on Mac and not other
+  // platforms and if there's a way to start unfocused while avoiding this
+  // workaround.
+  web_ui()->CallJavascriptFunction("sync.confirmation.clearFocus");
 }