VideoCaptureDeviceLinux: Add support for SPLANE+DMABUF V4L2 type capture

content/browser/media/capture/web_contents_video_capture_device_unittest.cc

Index: content/browser/media/capture/web_contents_video_capture_device_unittest.cc
diff --git a/content/browser/media/capture/web_contents_video_capture_device_unittest.cc b/content/browser/media/capture/web_contents_video_capture_device_unittest.cc
index 02b297f35e07f3eb491911698c07f49a46162fde..357e0888c4d0189fcc6b18dc14525024db6bd100 100644
--- a/content/browser/media/capture/web_contents_video_capture_device_unittest.cc
+++ b/content/browser/media/capture/web_contents_video_capture_device_unittest.cc
@@ -417,6 +417,9 @@ class StubClient : public media::VideoCaptureDevice::Client {
     gfx::GpuMemoryBufferType GetType() override {
       return gfx::SHARED_MEMORY_BUFFER;
     }
+    base::PlatformFile AsPlatformFile() const override {
+      return base::PlatformFile();
+    }
     ClientBuffer AsClientBuffer() override { return nullptr; }
 
    private: