Verify returned frames from media::VideoFrame::Wrap*() methods

content/renderer/pepper/content_decryptor_delegate.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 "content/renderer/pepper/content_decryptor_delegate.h"
 
 #include <vector>
 
 #include "base/callback_helpers.h"
 #include "base/metrics/sparse_histogram.h"
@@ skipping 1017 matching lines @@
       media::VideoFrame::WrapExternalYuvData(
           media::PIXEL_FORMAT_YV12, frame_size, gfx::Rect(frame_size),
           natural_size_, frame_info->strides[PP_DECRYPTEDFRAMEPLANES_Y],
           frame_info->strides[PP_DECRYPTEDFRAMEPLANES_U],
           frame_info->strides[PP_DECRYPTEDFRAMEPLANES_V],
           frame_data + frame_info->plane_offsets[PP_DECRYPTEDFRAMEPLANES_Y],
           frame_data + frame_info->plane_offsets[PP_DECRYPTEDFRAMEPLANES_U],
           frame_data + frame_info->plane_offsets[PP_DECRYPTEDFRAMEPLANES_V],
           base::TimeDelta::FromMicroseconds(
               frame_info->tracking_info.timestamp));
+  if (!decoded_frame) {
+    FreeBuffer(frame_info->tracking_info.buffer_id);
+    video_decode_cb.Run(Decryptor::kError, NULL);
+    return;
+  }
   decoded_frame->AddDestructionObserver(
       media::BindToCurrentLoop(
           base::Bind(&BufferNoLongerNeeded,
                      ppb_buffer,
                      base::Bind(&ContentDecryptorDelegate::FreeBuffer,
                                 weak_this_,
                                 frame_info->tracking_info.buffer_id))));
 
   video_decode_cb.Run(Decryptor::kSuccess, decoded_frame);
 }
@@ skipping 233 matching lines @@
                                           empty_frames);
   }
 
   if (!video_decode_cb_.is_null())
     video_decode_cb_.ResetAndReturn().Run(media::Decryptor::kError, NULL);
 
   cdm_promise_adapter_.Clear();
 }
 
 }  // namespace content