Fix homepage migration for users who never changed their settings.

chrome/browser/prefs/pref_service.h

Index: chrome/browser/prefs/pref_service.h
diff --git a/chrome/browser/prefs/pref_service.h b/chrome/browser/prefs/pref_service.h
index 890ec1b5045a74406b32297e7b22ec64e0fd558a..5502cb37f984ad722447ea9dcf31cc18b051dbf8 100644
--- a/chrome/browser/prefs/pref_service.h
+++ b/chrome/browser/prefs/pref_service.h
@@ -267,6 +267,10 @@ class PrefService : public base::NonThreadSafe {
   const base::DictionaryValue* GetDictionary(const char* path) const;
   const base::ListValue* GetList(const char* path) const;
 
+  // Returns the value of the given preference, from the user pref store. If
+  // the preference is not set in the user pref store, returns NULL.
+  const base::Value* GetUserPrefValue(const char* path) const;
+
   // Removes a user pref and restores the pref to its default value.
   void ClearPref(const char* path);