Mac build fix

base/waitable_event_posix.cc

 // Copyright (c) 2006-2008 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.
 
 #include "base/waitable_event.h"
 
 #include "base/condition_variable.h"
 #include "base/lock.h"
 #include "base/message_loop.h"
 
@@ skipping 285 matching lines @@
 //   The locks of the WaitableEvents have been taken in order and the Waiter has
 //   been enqueued in the wait-list of each. None of the WaitableEvents are
 //   currently signaled
 // else:
 //   None of the WaitableEvent locks are held. The Waiter has not been enqueued
 //   in any of them and the return value is the index of the first WaitableEvent
 //   which was signaled, from the end of the array.
 // -----------------------------------------------------------------------------
 // static
 unsigned WaitableEvent::EnqueueMany
-    (std::pair<WaitableEvent*, unsigned>* waitables,
+    (std::pair<WaitableEvent*, size_t>* waitables,
      unsigned count, Waiter* waiter) {
   if (!count)
     return 0;
 
   waitables[0].first->lock_.Acquire();
     if (waitables[0].first->signaled_) {
       if (!waitables[0].first->manual_reset_)
         waitables[0].first->signaled_ = false;
       waitables[0].first->lock_.Release();
       return count;
@@ skipping 66 matching lines @@
       return true;
     }
   }
 
   return false;
 }
 
 // -----------------------------------------------------------------------------
 
 }  // namespace base