Motown: Stop requiring size when releasing payload buffers.

services/media/framework_mojo/mojo_allocator.cc

 // Copyright 2016 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 "services/media/framework_mojo/mojo_allocator.h"
 
 namespace mojo {
 namespace media {
 
 MojoAllocator::~MojoAllocator() {}
 
 void* MojoAllocator::AllocatePayloadBuffer(size_t size) {
   return AllocateRegion(size);
 }
 
-void MojoAllocator::ReleasePayloadBuffer(size_t size, void* buffer) {
-  ReleaseRegion(size, buffer);
+void MojoAllocator::ReleasePayloadBuffer(void* buffer) {
+  ReleaseRegion(buffer);
 }
 
 }  // namespace media
 }  // namespace mojo