Revert 49985 - doh

base/callback.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.
 
 #ifndef BASE_CALLBACK_H_
 #define BASE_CALLBACK_H_
 
 #include "base/tuple.h"
 #include "base/raw_scoped_refptr_mismatch_checker.h"
 
@@ skipping 107 matching lines @@
     DispatchToMethod(this->obj_, this->meth_, params);
   }
 };
 
 // 0-arg implementation
 struct Callback0 {
   typedef CallbackRunner<Tuple0> Type;
 };
 
 template <class T>
-Callback0::Type* NewCallback(T* object, void (T::*method)()) {
+typename Callback0::Type* NewCallback(T* object, void (T::*method)()) {
   return new CallbackImpl<T, void (T::*)(), Tuple0 >(object, method);
 }
 
 // 1-arg implementation
 template <typename Arg1>
 struct Callback1 {
   typedef CallbackRunner<Tuple1<Arg1> > Type;
 };
 
 template <class T, typename Arg1>
@@ skipping 104 matching lines @@
 };
 
 template <class T, typename ReturnValue>
 typename CallbackWithReturnValue<ReturnValue>::Type*
 NewCallbackWithReturnValue(T* object, ReturnValue (T::*method)()) {
   return new CallbackWithReturnValueImpl<T, ReturnValue (T::*)(), ReturnValue>(
       object, method);
 }
 
 #endif  // BASE_CALLBACK_H