Bring up a content settings icon for ungestured registerProtocolHandler call.

chrome/browser/ui/browser_content_setting_bubble_model_delegate.cc

 // Copyright (c) 2012 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/browser_content_setting_bubble_model_delegate.h"
 
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/chrome_pages.h"
+#include "chrome/common/url_constants.h"
 
 BrowserContentSettingBubbleModelDelegate::
 BrowserContentSettingBubbleModelDelegate(Browser* browser) : browser_(browser) {
 }
 
 BrowserContentSettingBubbleModelDelegate::
 ~BrowserContentSettingBubbleModelDelegate() {
 }
 
 void BrowserContentSettingBubbleModelDelegate::ShowCollectedCookiesDialog(
     TabContents* contents) {
   browser_->ShowCollectedCookiesDialog(contents);
 }
 
 void BrowserContentSettingBubbleModelDelegate::ShowContentSettingsPage(
     ContentSettingsType type) {
+  if (type == CONTENT_SETTINGS_TYPE_REGISTER_PROTOCOL_HANDLER) {
+    chrome::ShowSettingsSubPage(browser_, chrome::kHandlerSettingsSubPage);
+    return;
+  }
+
   chrome::ShowContentSettings(browser_, type);
 }