Add support for encrypted WebM files as defined in the RFC.

media/filters/ffmpeg_video_decoder.cc

 // 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.
 
 #include "media/filters/ffmpeg_video_decoder.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
@@ skipping 155 matching lines @@
 
   ReleaseFFmpegResources();
   state_ = kUninitialized;
   closure.Run();
 }
 
 const gfx::Size& FFmpegVideoDecoder::natural_size() {
   return natural_size_;
 }
 
-void FFmpegVideoDecoder::set_decryptor(AesDecryptor* decryptor) {
+void FFmpegVideoDecoder::set_decryptor(HmacAesDecryptor* decryptor) {
   DCHECK_EQ(state_, kUninitialized);
   decryptor_ = decryptor;
 }
 
 FFmpegVideoDecoder::~FFmpegVideoDecoder() {
   ReleaseFFmpegResources();
 }
 
 void FFmpegVideoDecoder::DoRead(const ReadCB& read_cb) {
   DCHECK_EQ(MessageLoop::current(), message_loop_);
@@ skipping 241 matching lines @@
 scoped_refptr<VideoFrame> FFmpegVideoDecoder::AllocateVideoFrame() {
   VideoFrame::Format format = PixelFormatToVideoFormat(codec_context_->pix_fmt);
   size_t width = codec_context_->width;
   size_t height = codec_context_->height;
 
   return VideoFrame::CreateFrame(format, width, height,
                                  kNoTimestamp(), kNoTimestamp());
 }
 
 }  // namespace media