browser: Move more files into chrome namespace.

chrome/browser/prefs/browser_prefs.h

 // 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.
 
-#ifndef CHROME_BROWSER_PREFS_BROWSER_PREFS_H__
-#define CHROME_BROWSER_PREFS_BROWSER_PREFS_H__
+#ifndef CHROME_BROWSER_PREFS_BROWSER_PREFS_H_
+#define CHROME_BROWSER_PREFS_BROWSER_PREFS_H_
 #pragma once
 
 class PrefService;
 class Profile;
 
-namespace browser {
-
-// Bitmask for kMultipleProfilePrefMigration.
-enum MigratedPreferences {
-  NO_PREFS = 0,
-  DNS_PREFS = 1 << 0,
-  WINDOWS_PREFS = 1 << 1,
-  GOOGLE_URL_TRACKER_PREFS = 1 << 2,
-};
+namespace chrome {
 
 // Makes the PrefService objects aware of all the prefs.
 void RegisterLocalState(PrefService* local_state);
 void RegisterUserPrefs(PrefService* user_prefs);
-// Migrate prefs from local_state to |profile|'s pref store.
+
+// Migrates prefs from |local_state| to |profile|'s pref store.
 void MigrateBrowserPrefs(Profile* profile, PrefService* local_state);
 
-} // namespace browser
+}  // namespace chrome
 
-#endif  // CHROME_BROWSER_PREFS_BROWSER_PREFS_H__
+#endif  // CHROME_BROWSER_PREFS_BROWSER_PREFS_H_