Move prefs-related files under chrome/browser/ into a prefs/ subdir.

chrome/browser/defaults.h

 // Copyright (c) 2010 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.
 
 // Defines various defaults whose values varies depending upon the OS.
 
 #ifndef CHROME_BROWSER_DEFAULTS_H_
 #define CHROME_BROWSER_DEFAULTS_H_
 #pragma once
 
 #include "build/build_config.h"
-#include "chrome/browser/session_startup_pref.h"
+#include "chrome/browser/prefs/session_startup_pref.h"
 
 namespace browser_defaults {
 
 #if defined(USE_X11)
 
 // Size of the font in pixels used in the autocomplete box for normal windows.
 extern const double kAutocompleteEditFontPixelSize;
 
 // Size of the font in pixels used in the autocomplete box for popup windows.
 extern const double kAutocompleteEditFontPixelSizeInPopup;
@@ skipping 54 matching lines @@
 //=============================================================================
 // Runtime "const" - set only once after parsing command line option and should
 // never be modified after that.
 
 // Are bookmark enabled? True by default.
 extern bool bookmarks_enabled;
 
 }  // namespace browser_defaults
 
 #endif  // CHROME_BROWSER_DEFAULTS_H_