Move app_launcher.* out of chrome/browser/extensions and into apps/

apps/prefs.cc

+// Copyright 2013 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 "apps/prefs.h"
+
+#include "apps/app_launcher.h"
+#include "chrome/browser/prefs/pref_service.h"

[tfarina, 2013/02/01 15:11:24]

so is this allowed for now?

I think we need to add RegisterXXX support to base/prefs/

Joi?

[benwells, 2013/02/08 07:18:00]

It would be great to get rid of the dependency to chrome/browser/prefs. It looks
like I can remove the other dependencies but the RegisterXXX looks like a
problem.

+
+namespace apps {
+
+namespace prefs {
+
+// Local state caching knowledge of whether the app launcher is installed.
+const char kAppLauncherIsEnabled[] =
+    "apps.app_launcher.should_show_apps_page";
+
+}  // namespace prefs
+
+void RegisterPrefs(PrefServiceSimple* pref_service) {
+  // This pref is a cache of the value from the registry the last time it was
+  // checked.
+  //
+  // During the pref initialization, if it is impossible to synchronously
+  // determine whether the app launcher is enabled, assume it is disabled.
+  // Anything that needs to know the absolute truth should call
+  // GetIsAppLauncherEnabled().
+  pref_service->RegisterBooleanPref(prefs::kAppLauncherIsEnabled,
+                                    MaybeIsAppLauncherEnabled());
+}
+
+}  // namespace apps