Declarative content scripts: Browser-side: per-extension shared memory regions (lazily loaded)

chrome/browser/extensions/declarative_user_script_master.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 "chrome/browser/extensions/declarative_user_script_master.h"
+
+#include <set>
+
+#include "chrome/browser/profiles/profile.h"
+#include "extensions/browser/extension_registry.h"
+
+namespace extensions {
+
+DeclarativeUserScriptMaster::DeclarativeUserScriptMaster(
+    Profile* profile,
+    const ExtensionId& extension_id)
+    : extension_id_(extension_id),
+      loader_(profile,
+              extension_id,
+              false /* listen_for_extension_system_loaded */),
+      extension_registry_observer_(this) {
+  extension_registry_observer_.Add(ExtensionRegistry::Get(profile));
+}
+
+DeclarativeUserScriptMaster::~DeclarativeUserScriptMaster() {
+}
+
+void DeclarativeUserScriptMaster::OnExtensionUnloaded(
+    content::BrowserContext* browser_context,
+    const Extension* extension,
+    UnloadedExtensionInfo::Reason reason) {
+  if (extension_id_ == extension->id()) {
+    loader_.ClearExtensionInfo(extension_id_);
+    ClearScripts();
+  }
+}
+
+void DeclarativeUserScriptMaster::AddScript(const UserScript& script) {
+  std::set<UserScript> set;
+  set.insert(script);
+  loader_.AddScripts(set);
+}
+
+void DeclarativeUserScriptMaster::RemoveScript(const UserScript& script) {
+  std::set<UserScript> set;
+  set.insert(script);
+  loader_.RemoveScripts(set);
+}
+
+void DeclarativeUserScriptMaster::ClearScripts() {
+  loader_.ClearScripts();
+}
+
+}  // namespace extensions