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

content/browser/renderer_host/media/video_capture_device_client.cc

 // 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.
 
 #include "content/browser/renderer_host/media/video_capture_device_client.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 350 matching lines @@
     case media::PIXEL_STORAGE_CPU:
       frame = VideoFrame::WrapExternalSharedMemory(
           media::PIXEL_FORMAT_I420, frame_format.frame_size,
           gfx::Rect(frame_format.frame_size), frame_format.frame_size,
           reinterpret_cast<uint8_t*>(buffer->data()),
           VideoFrame::AllocationSize(media::PIXEL_FORMAT_I420,
                                      frame_format.frame_size),
           base::SharedMemory::NULLHandle(), 0u, base::TimeDelta());
       break;
   }
-  DCHECK(frame.get());
+  if (!frame)
+    return;
   frame->metadata()->SetDouble(media::VideoFrameMetadata::FRAME_RATE,
                                frame_format.frame_rate);
   OnIncomingCapturedVideoFrame(std::move(buffer), frame, timestamp);
 }
 
 void VideoCaptureDeviceClient::OnIncomingCapturedVideoFrame(
     scoped_ptr<Buffer> buffer,
     const scoped_refptr<VideoFrame>& frame,
     const base::TimeTicks& timestamp) {
   BrowserThread::PostTask(
@@ skipping 73 matching lines @@
           reinterpret_cast<uint8_t*>(buffer->data(VideoFrame::kUPlane));
       *v_plane_data =
           reinterpret_cast<uint8_t*>(buffer->data(VideoFrame::kVPlane));
       return buffer;
   }
   NOTREACHED();
   return scoped_ptr<Buffer>();
 }
 
 }  // namespace content