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

chrome/browser/cocoa/preferences_window_controller.mm

Index: chrome/browser/cocoa/preferences_window_controller.mm
diff --git a/chrome/browser/cocoa/preferences_window_controller.mm b/chrome/browser/cocoa/preferences_window_controller.mm
index 777f1d0613633f3e1a4de75fa5fa99bb7a7f96cd..272a3b2aa3fe55b99b722d2993f424a51933fa56 100644
--- a/chrome/browser/cocoa/preferences_window_controller.mm
+++ b/chrome/browser/cocoa/preferences_window_controller.mm
@@ -33,17 +33,17 @@
 #import "chrome/browser/cocoa/window_size_autosaver.h"
 #include "chrome/browser/download/download_manager.h"
 #include "chrome/browser/extensions/extensions_service.h"
-#include "chrome/browser/managed_prefs_banner_base.h"
 #include "chrome/browser/metrics/metrics_service.h"
 #include "chrome/browser/metrics/user_metrics.h"
 #include "chrome/browser/net/predictor_api.h"
 #include "chrome/browser/net/url_fixer_upper.h"
-#include "chrome/browser/options_window.h"
 #include "chrome/browser/options_util.h"
-#include "chrome/browser/pref_service.h"
+#include "chrome/browser/options_window.h"
+#include "chrome/browser/policy/managed_prefs_banner_base.h"
+#include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/prefs/session_startup_pref.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
-#include "chrome/browser/session_startup_pref.h"
 #include "chrome/browser/shell_integration.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/sync_ui_util.h"
@@ -59,8 +59,8 @@
 #include "grit/generated_resources.h"
 #include "grit/locale_settings.h"
 #include "grit/theme_resources.h"
-#import "third_party/GTM/AppKit/GTMUILocalizerAndLayoutTweaker.h"
 #import "third_party/GTM/AppKit/GTMNSAnimation+Duration.h"
+#import "third_party/GTM/AppKit/GTMUILocalizerAndLayoutTweaker.h"
 
 namespace {