[Web Intents] Add ability to dispatch intents from extension-caused code (i.e. context menus)

chrome/browser/intents/web_intents_util.h

 // 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.
 
 #ifndef CHROME_BROWSER_INTENTS_WEB_INTENTS_UTIL_H_
 #define CHROME_BROWSER_INTENTS_WEB_INTENTS_UTIL_H_
 
+class Browser;
 class Profile;
 class PrefService;
 
 namespace web_intents {
 
 // Registers the preferences related to Web Intents.
 void RegisterUserPrefs(PrefService* user_prefs);
 
 // Returns true if WebIntents are enabled in preferences.
 bool IsWebIntentsEnabled(PrefService* prefs);
 
 // Returns true if WebIntents are enabled due to various factors. |profile| is
 // the Profile to check that WebIntents are enabled for.
 bool IsWebIntentsEnabledForProfile(Profile* profile);
 
+// In a context where we are generating a web intent based on internal events,
+// or from an extension background page, get the browser in which to show the
+// intent picker to the user.
+Browser* GetBrowserForBackgroundWebIntentDelivery(Profile* profile);
+
 }  // namespace web_intents
 
 #endif  // CHROME_BROWSER_INTENTS_WEB_INTENTS_UTIL_H_