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/google/google_util.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/chrome_pages.h"
+#include "chrome/common/url_constants.h"
 
 // The URL for when the user clicks "learn more" on the mixed scripting page
 // icon bubble.
 const char kInsecureScriptHelpUrl[] =
     "https://support.google.com/chrome/bin/answer.py?answer=1342714";
 
 BrowserContentSettingBubbleModelDelegate::
 BrowserContentSettingBubbleModelDelegate(Browser* browser) : browser_(browser) {
 }
 
 BrowserContentSettingBubbleModelDelegate::
 ~BrowserContentSettingBubbleModelDelegate() {
 }
 
 void BrowserContentSettingBubbleModelDelegate::ShowCollectedCookiesDialog(
     TabContents* contents) {
   chrome::ShowCollectedCookiesDialog(contents);
 }
 
 void BrowserContentSettingBubbleModelDelegate::ShowContentSettingsPage(
     ContentSettingsType type) {
   if (type == CONTENT_SETTINGS_TYPE_MIXEDSCRIPT) {
     // We don't (yet?) implement user-settable exceptions for mixed script
     // blocking, so bounce to an explanatory page for now.
     GURL url(google_util::AppendGoogleLocaleParam(
         GURL(kInsecureScriptHelpUrl)));
     chrome::AddSelectedTabWithURL(browser_, url, content::PAGE_TRANSITION_LINK);
-  } else {
-    chrome::ShowContentSettings(browser_, type);
+    return;
   }
+
+  if (type == CONTENT_SETTINGS_TYPE_PROTOCOL_HANDLERS) {
+    chrome::ShowSettingsSubPage(browser_, chrome::kHandlerSettingsSubPage);
+    return;
+  }
+
+  chrome::ShowContentSettings(browser_, type);
 }