bookmarks: Forward declare DefaultSingletonTraits in bookmark_model_factory.h

R=sky@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10836050

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@149847 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/bookmarks/bookmark_model_factory.cc

@@ -4,6 +4,7 @@
 
 #include "chrome/browser/bookmarks/bookmark_model_factory.h"
 
+#include "base/memory/singleton.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/history/history_service_factory.h"
 #include "chrome/browser/prefs/pref_service.h"

chrome/browser/bookmarks/bookmark_model_factory.h

@@ -5,9 +5,12 @@
 #ifndef CHROME_BROWSER_BOOKMARKS_BOOKMARK_MODEL_FACTORY_H_
 #define CHROME_BROWSER_BOOKMARKS_BOOKMARK_MODEL_FACTORY_H_
 
-#include "base/memory/singleton.h"
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
 #include "chrome/browser/profiles/profile_keyed_service_factory.h"
 
+template <typename T> struct DefaultSingletonTraits;
+
 class Profile;
 class BookmarkModel;
 
@@ -33,6 +36,8 @@ class BookmarkModelFactory : public ProfileKeyedServiceFactory {
   virtual void RegisterUserPrefs(PrefService* user_prefs) OVERRIDE;
   virtual bool ServiceRedirectedInIncognito() OVERRIDE;
   virtual bool ServiceIsNULLWhileTesting() OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(BookmarkModelFactory);
 };
 
 #endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_MODEL_FACTORY_H_