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

chrome/browser/extensions/shared_user_script_master.cc

Index: chrome/browser/extensions/shared_user_script_master.cc
diff --git a/chrome/browser/extensions/shared_user_script_master.cc b/chrome/browser/extensions/shared_user_script_master.cc
new file mode 100644
index 0000000000000000000000000000000000000000..803ba0682545651b5075591cd338f3a828795cc5
--- /dev/null
+++ b/chrome/browser/extensions/shared_user_script_master.cc
@@ -0,0 +1,56 @@
+// 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/shared_user_script_master.h"
+
+#include "chrome/browser/extensions/extension_util.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/extensions/manifest_handlers/content_scripts_handler.h"
+#include "extensions/browser/extension_registry.h"
+
+namespace extensions {
+
+SharedUserScriptMaster::SharedUserScriptMaster(Profile* profile)
+    : loader_(profile,
+              std::string() /* owner_extension_id */,
+              true /* listen_for_extension_system_loaded */),
+      profile_(profile),
+      extension_registry_observer_(this) {
+  extension_registry_observer_.Add(ExtensionRegistry::Get(profile_));
+}
+
+SharedUserScriptMaster::~SharedUserScriptMaster() {
+}
+
+void SharedUserScriptMaster::OnExtensionLoaded(
+    content::BrowserContext* browser_context,
+    const Extension* extension) {
+  loader_.AddScripts(GetScriptsMetadata(extension));
+}
+
+void SharedUserScriptMaster::OnExtensionUnloaded(
+    content::BrowserContext* browser_context,
+    const Extension* extension,
+    UnloadedExtensionInfo::Reason reason) {
+  loader_.RemoveScripts(GetScriptsMetadata(extension));
+}
+
+const std::set<UserScript> SharedUserScriptMaster::GetScriptsMetadata(
+    const Extension* extension) {
+  bool incognito_enabled = util::IsIncognitoEnabled(extension->id(), profile_);
+  const UserScriptList& script_list =
+      ContentScriptsInfo::GetContentScripts(extension);
+  std::set<UserScript> script_set;
+  for (UserScriptList::const_iterator it = script_list.begin();
+       it != script_list.end();
+       ++it) {
+    UserScript script = *it;
+    script.set_incognito_enabled(incognito_enabled);
+    script_set.insert(script);
+  }
+
+  return script_set;
+}
+
+}  // namespace extensions