Mojo: Convert MemoryTest.Valid to the new user pointer handling (see r285350).

mojo/system/core.cc

 // Copyright 2013 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 "mojo/system/core.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/time/time.h"
@@ skipping 482 matching lines @@
     base::AutoLock locker(mapping_table_lock_);
     result = mapping_table_.AddMapping(mapping.Pass());
   }
   if (result != MOJO_RESULT_OK)
     return result;
 
   buffer.Put(address);
   return MOJO_RESULT_OK;
 }
 
-MojoResult Core::UnmapBuffer(UserPointerValue<void> buffer) {
+MojoResult Core::UnmapBuffer(UserPointer<void> buffer) {
   base::AutoLock locker(mapping_table_lock_);
-  return mapping_table_.RemoveMapping(buffer.GetValue());
+  return mapping_table_.RemoveMapping(buffer.GetPointerValue());
 }
 
 // Note: We allow |handles| to repeat the same handle multiple times, since
 // different flags may be specified.
 // TODO(vtl): This incurs a performance cost in |RemoveWaiter()|. Analyze this
 // more carefully and address it if necessary.
 MojoResult Core::WaitManyInternal(const MojoHandle* handles,
                                   const MojoHandleSignals* signals,
                                   uint32_t num_handles,
                                   MojoDeadline deadline,
@@ skipping 36 matching lines @@
   // |Wait()|/|WaitMany()| call. (Only after doing this can |waiter| be
   // destroyed, but this would still be required if the waiter were in TLS.)
   for (i = 0; i < num_added; i++)
     dispatchers[i]->RemoveWaiter(&waiter);
 
   return rv;
 }
 
 }  // namespace system
 }  // namespace mojo