Replace size_t with int in a few media classes.

media/base/data_buffer.h

 // Copyright (c) 2012 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.
 
 // A simple implementation of Buffer that takes ownership of the given data
 // pointer.
 //
 // DataBuffer assumes that memory was allocated with new uint8[].
 
 #ifndef MEDIA_BASE_DATA_BUFFER_H_
 #define MEDIA_BASE_DATA_BUFFER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "media/base/buffers.h"
 
 namespace media {
 
 class MEDIA_EXPORT DataBuffer : public Buffer {
  public:
   // Assumes valid data of size |buffer_size|.
-  DataBuffer(scoped_array<uint8> buffer, size_t buffer_size);
+  DataBuffer(scoped_array<uint8> buffer, int buffer_size);
 
   // Allocates buffer of size |buffer_size|. If |buffer_size| is 0, |data_| is
   // set to a NULL ptr.
-  explicit DataBuffer(size_t buffer_size);
+  explicit DataBuffer(int buffer_size);
 
   // Create a DataBuffer whose |data_| is copied from |data|.
-  static scoped_refptr<DataBuffer> CopyFrom(const uint8* data, size_t size);
+  static scoped_refptr<DataBuffer> CopyFrom(const uint8* data, int size);
 
   // Buffer implementation.
   virtual const uint8* GetData() const OVERRIDE;
-  virtual size_t GetDataSize() const OVERRIDE;
+  virtual int GetDataSize() const OVERRIDE;
   virtual const DecryptConfig* GetDecryptConfig() const OVERRIDE;
 
   // Returns a read-write pointer to the buffer data.
   virtual uint8* GetWritableData();
 
   // Updates the size of valid data in bytes, which must be less than or equal
   // to GetBufferSize().
-  virtual void SetDataSize(size_t data_size);
+  virtual void SetDataSize(int data_size);
 
   // Returns the size of the underlying buffer.
-  virtual size_t GetBufferSize() const;
+  virtual int GetBufferSize() const;
 
   virtual void SetDecryptConfig(scoped_ptr<DecryptConfig> decrypt_config);
 
  protected:
   virtual ~DataBuffer();
 
  private:
   scoped_array<uint8> data_;
-  size_t buffer_size_;
-  size_t data_size_;
+  int buffer_size_;
+  int data_size_;
   scoped_ptr<DecryptConfig> decrypt_config_;
 
   DISALLOW_COPY_AND_ASSIGN(DataBuffer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_DATA_BUFFER_H_