Implement sidebar support for extension action popups

extensions/shell/browser/shell_extension_system.cc

 // Copyright 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 "extensions/shell/browser/shell_extension_system.h"
 
 #include <string>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ skipping 105 matching lines @@
 }
 
 StateStore* ShellExtensionSystem::state_store() {
   return nullptr;
 }
 
 StateStore* ShellExtensionSystem::rules_store() {
   return nullptr;
 }
 
+SidebarManager* ShellExtensionSystem::sidebar_manager() {
+  return nullptr;
+}
+
 InfoMap* ShellExtensionSystem::info_map() {
   if (!info_map_.get())
     info_map_ = new InfoMap;
   return info_map_.get();
 }
 
 QuotaService* ShellExtensionSystem::quota_service() {
   return quota_service_.get();
 }
 
@@ skipping 21 matching lines @@
 ContentVerifier* ShellExtensionSystem::content_verifier() {
   return nullptr;
 }
 
 scoped_ptr<ExtensionSet> ShellExtensionSystem::GetDependentExtensions(
     const Extension* extension) {
   return make_scoped_ptr(new ExtensionSet());
 }
 
 }  // namespace extensions