VideoCaptureDeviceLinux: Add support for SPLANE+DMABUF V4L2 type capture

media/video/capture/video_capture_device.h

Index: media/video/capture/video_capture_device.h
diff --git a/media/video/capture/video_capture_device.h b/media/video/capture/video_capture_device.h
index 41a1d771d11602ccf74841d46b3cbb020390798e..a2e933067296360ed46f7c346c95db40beb025c8 100644
--- a/media/video/capture/video_capture_device.h
+++ b/media/video/capture/video_capture_device.h
@@ -15,6 +15,7 @@
 #include <list>
 #include <string>
 
+#include "base/files/file.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ -203,6 +204,7 @@ class MEDIA_EXPORT VideoCaptureDevice {
       virtual size_t size() const = 0;
       virtual void* data() = 0;
       virtual gfx::GpuMemoryBufferType GetType() = 0;
+      virtual base::PlatformFile AsPlatformFile() const = 0;

[Pawel Osciak, 2015/06/15 10:34:55]

Are there platforms where it would not be a dmabuf (but would still be usable in
this context)? What would it be then?

[mcasas, 2015/06/17 01:30:53]

Actually this is landed and needs rebase. But to answer
the question, yes, this can be a Shared Memory in any
non-Linux-DmaBuf platform.

       virtual ClientBuffer AsClientBuffer() = 0;
     };