Move the bits of Prefs where production code has only trivially easy

base/prefs/public/pref_service_base.h

Index: base/prefs/public/pref_service_base.h
diff --git a/chrome/browser/api/prefs/pref_service_base.h b/base/prefs/public/pref_service_base.h
similarity index 98%
rename from chrome/browser/api/prefs/pref_service_base.h
rename to base/prefs/public/pref_service_base.h
index 58737df55269d40472f58aa793401fee54f6c4de..aa5b3fd823da28b7fae8a28f047ac319c422bd28 100644
--- a/chrome/browser/api/prefs/pref_service_base.h
+++ b/base/prefs/public/pref_service_base.h
@@ -13,8 +13,8 @@
 // information and MUST not be extracted, overwritten or modified except
 // through Chromium defined APIs.
 
-#ifndef CHROME_BROWSER_API_PREFS_PREF_SERVICE_BASE_H_
-#define CHROME_BROWSER_API_PREFS_PREF_SERVICE_BASE_H_
+#ifndef BASE_PREFS_PUBLIC_PREF_SERVICE_BASE_H_
+#define BASE_PREFS_PUBLIC_PREF_SERVICE_BASE_H_
 
 #include "base/values.h"
 
@@ -269,4 +269,4 @@ class PrefServiceBase {
                                   content::NotificationObserver* obs) = 0;
 };
 
-#endif  // CHROME_BROWSER_API_PREFS_PREF_SERVICE_BASE_H_
+#endif  // BASE_PREFS_PUBLIC_PREF_SERVICE_BASE_H_