Add an extension override bubble and warning box for proxy extensions.

chrome/browser/extensions/settings_api_helpers.cc

 // Copyright (c) 2014 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/extensions/settings_api_helpers.h"
 
 #include "chrome/browser/extensions/api/preference/preference_api.h"
 #include "chrome/common/pref_names.h"
+#include "extensions/browser/extension_pref_value_map.h"
+#include "extensions/browser/extension_pref_value_map_factory.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/common/extension_set.h"
 
 namespace extensions {
 
 const extensions::SettingsOverrides* FindOverridingExtension(
     content::BrowserContext* browser_context,
     SettingsApiOverrideType type,
     const Extension** extension) {
   const extensions::ExtensionSet& extensions =
@@ skipping 74 matching lines @@
         search_provider) {
   const extensions::Extension* extension = NULL;
   const extensions::SettingsOverrides* settings =
       FindOverridingExtension(
           browser_context, BUBBLE_TYPE_SEARCH_ENGINE, &extension);
   if (settings && search_provider)
     search_provider = settings->search_engine.get();
   return extension;
 }
 
+const Extension* OverridesProxy(content::BrowserContext* browser_context) {
+  ExtensionPrefValueMap* extension_prefs_value_map =
+      ExtensionPrefValueMapFactory::GetForBrowserContext(browser_context);
+  std::string extension_id =
+      extension_prefs_value_map->GetExtensionControllingPref(prefs::kProxy);
+  return extensions::ExtensionRegistry::Get(browser_context)->GetExtensionById(

[Devlin, 2014/05/20 17:26:31]

nit: no extensions:: prefix.

[Finnur, 2014/05/21 16:30:32]

Done.

+      extension_id, ExtensionRegistry::ENABLED);
+}
+
 }  // namespace extensions