Add allocator interface for use by cdm_adapter

media/cdm/cdm_buffer.cc

Index: media/cdm/cdm_buffer.cc
diff --git a/mojo/shell/application_package_apptest.mojom b/media/cdm/cdm_buffer.cc
similarity index 56%
copy from mojo/shell/application_package_apptest.mojom
copy to media/cdm/cdm_buffer.cc
index 88cbeead00097e37ae7b4f0e4559978266a6f90b..ca5c3f9b6064247fad2abd1816a2a55a2bb7da61 100644
--- a/mojo/shell/application_package_apptest.mojom
+++ b/media/cdm/cdm_buffer.cc
@@ -2,8 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-module mojo.shell.test.mojom;
+#include "media/cdm/cdm_buffer.h"
 
-interface ApplicationPackageApptestService {
-  GetName() => (string name);
-};
+namespace media {
+
+CdmBuffer::CdmBuffer() {}
+
+CdmBuffer::~CdmBuffer() {}
+
+}  // namespace media