Implement sidebar support for extension action popups

chrome/browser/extensions/extension_system_impl.cc

Index: chrome/browser/extensions/extension_system_impl.cc
diff --git a/chrome/browser/extensions/extension_system_impl.cc b/chrome/browser/extensions/extension_system_impl.cc
index 667a693bc2a8af8906074a1be7de252f404e9299..8891a55ab977ac789b065205b5cba69d42c27859 100644
--- a/chrome/browser/extensions/extension_system_impl.cc
+++ b/chrome/browser/extensions/extension_system_impl.cc
@@ -26,6 +26,7 @@
 #include "chrome/browser/extensions/navigation_observer.h"
 #include "chrome/browser/extensions/shared_module_service.h"
 #include "chrome/browser/extensions/shared_user_script_master.h"
+#include "chrome/browser/extensions/sidebar_manager.h"
 #include "chrome/browser/extensions/state_store_notification_observer.h"
 #include "chrome/browser/extensions/unpacked_installer.h"
 #include "chrome/browser/profiles/profile.h"
@@ -557,4 +558,15 @@ void ExtensionSystemImpl::UnregisterExtensionWithRequestContexts(
       base::Bind(&InfoMap::RemoveExtension, info_map(), extension_id, reason));
 }
 
+SidebarManager* ExtensionSystemImpl::sidebar_manager() {
+  if (!sidebar_manager_)
+    CreateSidebarManager();
+  return sidebar_manager_.get();
+}
+
+void ExtensionSystemImpl::CreateSidebarManager() {
+  DCHECK(sidebar_manager_.get() == NULL);
+  sidebar_manager_ = new SidebarManager();
+}
+
 }  // namespace extensions