Add allocator interface for use by cdm_adapter

media/cdm/simple_cdm_buffer.h

 // Copyright 2015 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_CDM_BUFFER_IMPL_H_
-#define MEDIA_CDM_CDM_BUFFER_IMPL_H_
+#ifndef MEDIA_CDM_SIMPLE_CDM_BUFFER_H_
+#define MEDIA_CDM_SIMPLE_CDM_BUFFER_H_
 
 #include <stdint.h>
-
 #include <vector>
 
 #include "base/macros.h"
+#include "media/base/video_frame.h"
 #include "media/cdm/api/content_decryption_module.h"
+#include "media/cdm/cdm_buffer.h"
 
 namespace media {
 
+class CdmBufferAllocator;
+
 // cdm::Buffer implementation that provides access to memory. This is a simple
 // implementation that stores the data in a std::vector<uint8_t>.
-class CdmBuffer : public cdm::Buffer {
+class SimpleCdmBuffer : public CdmBuffer {
  public:
-  static CdmBuffer* Create(uint32_t capacity);
+  static scoped_refptr<SimpleCdmBuffer> Create(CdmBufferAllocator* allocator,
+                                               uint32_t capacity);
 
   // cdm::Buffer implementation.
   void Destroy() final;
   uint32_t Capacity() const final;
   uint8_t* Data() final;
   void SetSize(uint32_t size) final;
   uint32_t Size() const final;
 
  private:
-  CdmBuffer(uint32_t capacity);
-  ~CdmBuffer() final;
+  SimpleCdmBuffer(CdmBufferAllocator* allocator, uint32_t capacity);
+  ~SimpleCdmBuffer() final;
 
+  CdmBufferAllocator* allocator_;
   std::vector<uint8_t> buffer_;
   uint32_t size_;
 
-  DISALLOW_COPY_AND_ASSIGN(CdmBuffer);
+  DISALLOW_COPY_AND_ASSIGN(SimpleCdmBuffer);
 };
 
 }  // namespace media
 
-#endif
+#endif  // MEDIA_CDM_SIMPLE_CDM_BUFFER_H_