Add allocator interface for use by cdm_adapter

media/cdm/simple_cdm_allocator.h

Index: media/cdm/simple_cdm_allocator.h
diff --git a/media/cdm/simple_cdm_allocator.h b/media/cdm/simple_cdm_allocator.h
new file mode 100644
index 0000000000000000000000000000000000000000..3715c56c5bbb20194028208742e30772b1960dbb
--- /dev/null
+++ b/media/cdm/simple_cdm_allocator.h
@@ -0,0 +1,31 @@
+// 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.
+
+#ifndef MEDIA_CDM_SIMPLE_CDM_ALLOCATOR_H_
+#define MEDIA_CDM_SIMPLE_CDM_ALLOCATOR_H_
+
+#include <stdint.h>
+
+#include "base/macros.h"
+#include "media/cdm/cdm_allocator.h"
+
+namespace media {
+
+// This is a simple CdmAllocator for testing.
+class SimpleCdmAllocator : public CdmAllocator {
+ public:
+  SimpleCdmAllocator();
+  ~SimpleCdmAllocator() final;
+
+  // CdmAllocator implementation.
+  cdm::Buffer* CreateCdmBuffer(uint32_t capacity) final;
+  scoped_ptr<VideoFrameImpl> CreateCdmVideoFrame() final;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SimpleCdmAllocator);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_CDM_SIMPLE_CDM_ALLOCATOR_H_