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

mojo/system/core.h

 // 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.
 
 #ifndef MOJO_SYSTEM_CORE_H_
 #define MOJO_SYSTEM_CORE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
@@ skipping 84 matching lines @@
       UserPointer<MojoHandle> shared_buffer_handle);
   MojoResult DuplicateBufferHandle(
       MojoHandle buffer_handle,
       UserPointer<const MojoDuplicateBufferHandleOptions> options,
       UserPointer<MojoHandle> new_buffer_handle);
   MojoResult MapBuffer(MojoHandle buffer_handle,
                        uint64_t offset,
                        uint64_t num_bytes,
                        UserPointer<void*> buffer,
                        MojoMapBufferFlags flags);
-  MojoResult UnmapBuffer(UserPointerValue<void> buffer);
+  MojoResult UnmapBuffer(UserPointer<void> buffer);
 
  private:
   friend bool internal::ShutdownCheckNoLeaks(Core*);
 
   // Internal implementation of |Wait()| and |WaitMany()|; doesn't do basic
   // validation of arguments. |*result_index| is only set if the result (whether
   // success or failure) applies to a specific handle, so its value should be
   // preinitialized to |static_cast<uint32_t>(-1)|.
   MojoResult WaitManyInternal(const MojoHandle* handles,
                               const MojoHandleSignals* signals,
@@ skipping 13 matching lines @@
 
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(Core);
 };
 
 }  // namespace system
 }  // namespace mojo
 
 #endif  // MOJO_SYSTEM_CORE_H_