Move the parsing of "chrome_url_overrides" out of Extension.

chrome/browser/extensions/api/url_overrides/url_overrides_api.cc

+// Copyright (c) 2012 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/api/url_overrides/url_overrides_api.h"
+
+#include "chrome/browser/extensions/extension_web_ui.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/extensions/api/url_overrides/url_overrides_handler.h"
+#include "chrome/common/extensions/extension_manifest_constants.h"
+#include "chrome/common/extensions/manifest_handler.h"
+#include "content/public/browser/notification_details.h"
+#include "content/public/browser/notification_service.h"
+
+namespace extensions {
+
+URLOverridesAPI::URLOverridesAPI(Profile* profile)
+    : profile_(profile) {
+  ManifestHandler::Register(extension_manifest_keys::kChromeURLOverrides,
+                            new URLOverridesHandler);
+
+  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LOADED,
+                 content::Source<Profile>(profile));
+  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
+                 content::Source<Profile>(profile));
+}
+
+URLOverridesAPI::~URLOverridesAPI() {
+}
+
+void URLOverridesAPI::Observe(int type,
+                              const content::NotificationSource& source,
+                              const content::NotificationDetails& details) {
+  if (type == chrome::NOTIFICATION_EXTENSION_LOADED) {
+    const Extension* extension =
+        content::Details<const Extension>(details).ptr();
+    ExtensionWebUI::RegisterChromeURLOverrides(
+        profile_, URLOverridesInfo::GetChromeURLOverrides(extension));
+
+  } else if (type == chrome::NOTIFICATION_EXTENSION_UNLOADED) {
+    const Extension* extension =
+        content::Details<const UnloadedExtensionInfo>(details)->extension;
+    ExtensionWebUI::UnregisterChromeURLOverrides(
+        profile_, URLOverridesInfo::GetChromeURLOverrides(extension));
+  }
+}
+
+}  // namespace extensions