Enable profile switching for standalone App Launcher via the Settings App.

chrome/browser/ui/app_list/app_list_util.cc

 // Copyright 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/ui/app_list/app_list_util.h"
 
+#include "base/file_util.h"
 #include "build/build_config.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/extensions/extension_prefs.h"
+#include "chrome/browser/prefs/pref_service.h"
+#include "chrome/common/chrome_constants.h"
+#include "chrome/common/pref_names.h"
 
 namespace chrome {
 
 #if defined(OS_CHROMEOS)
 // Default implementation for ports which do not have this implemented.
-void InitAppList() {}
+void InitAppList(Profile* profile) {}
 #endif
 
+#if defined(ENABLE_APP_LIST)
+FilePath GetAppListProfilePath(const FilePath& user_data_dir) {
+  PrefService* local_state = g_browser_process->local_state();
+  DCHECK(local_state);
+
+  std::string app_list_profile;
+  if (local_state->HasPrefPath(prefs::kAppListProfile))
+    app_list_profile = local_state->GetString(prefs::kAppListProfile);
+
+  // If the user has no profile preference for the app launcher, default to the
+  // last browser profile used.
+  if (app_list_profile.empty() &&
+      local_state->HasPrefPath(prefs::kProfileLastUsed))
+    app_list_profile = local_state->GetString(prefs::kProfileLastUsed);
+
+  std::string profile_path = app_list_profile.empty() ?
+      chrome::kInitialProfile :
+      app_list_profile;
+
+  return user_data_dir.AppendASCII(profile_path);
+}
+
+void RegisterAppListPrefs(PrefServiceSimple* prefs) {
+  prefs->RegisterStringPref(prefs::kAppListProfile, "");
+}
+#endif  // defined(ENABLE_APP_LIST)
+
+
 }  // namespace chrome