Add message and Help Center link to the chooser UI

chrome/browser/ui/website_settings/chooser_bubble_delegate.cc

Index: chrome/browser/ui/website_settings/chooser_bubble_delegate.cc
diff --git a/chrome/browser/ui/website_settings/chooser_bubble_delegate.cc b/chrome/browser/ui/website_settings/chooser_bubble_delegate.cc
index 8b209753ca10767380b26589ac56f26ee0fc7d5c..9410f8315ba6be45e0bf6ca5a6ba23a74f179454 100644
--- a/chrome/browser/ui/website_settings/chooser_bubble_delegate.cc
+++ b/chrome/browser/ui/website_settings/chooser_bubble_delegate.cc
@@ -2,10 +2,31 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "chrome/browser/net/referrer.h"
+#include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser_finder.h"
+#include "chrome/browser/ui/host_desktop.h"
+#include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
 #include "chrome/browser/ui/website_settings/chooser_bubble_delegate.h"
 #include "content/public/browser/web_contents.h"
 
+namespace {
+
+Browser* GetBrowser() {
+  chrome::ScopedTabbedBrowserDisplayer browser_displayer(
+      ProfileManager::GetActiveUserProfile());
+  DCHECK(browser_displayer.browser());
+  return browser_displayer.browser();
+}
+
+void OpenURL(const GURL& url) {
+  GetBrowser()->OpenURL(
+      content::OpenURLParams(url, content::Referrer(), NEW_BACKGROUND_TAB,
+                             ui::PAGE_TRANSITION_AUTO_TOPLEVEL, true));
+}
+
+}  // namespace
+
 ChooserBubbleDelegate::ChooserBubbleDelegate(content::RenderFrameHost* owner)
     : browser_(chrome::FindBrowserWithWebContents(
           content::WebContents::FromRenderFrameHost(owner))),
@@ -13,6 +34,10 @@ ChooserBubbleDelegate::ChooserBubbleDelegate(content::RenderFrameHost* owner)
 
 ChooserBubbleDelegate::~ChooserBubbleDelegate() {}
 
+void ChooserBubbleDelegate::OpenHelpCenterURL() const {
+  OpenURL(GetHelpCenterURL());
+}
+
 std::string ChooserBubbleDelegate::GetName() const {
   return "ChooserBubble";
 }