v4l2 accelerators: use V4L2_CAP_VIDEO_M2M_MPLANE capability.

content/common/gpu/media/v4l2_image_processor.cc

Index: content/common/gpu/media/v4l2_image_processor.cc
diff --git a/content/common/gpu/media/v4l2_image_processor.cc b/content/common/gpu/media/v4l2_image_processor.cc
index ff2c110845b95bd6e4bf329e51d4ba90101a3f40..20e41d0525ba02f348088cc1eacb0b102ecda470 100644
--- a/content/common/gpu/media/v4l2_image_processor.cc
+++ b/content/common/gpu/media/v4l2_image_processor.cc
@@ -135,8 +135,7 @@ bool V4L2ImageProcessor::Initialize(media::VideoPixelFormat input_format,
   // Capabilities check.
   struct v4l2_capability caps;
   memset(&caps, 0, sizeof(caps));
-  const __u32 kCapsRequired = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
-                              V4L2_CAP_VIDEO_OUTPUT_MPLANE | V4L2_CAP_STREAMING;
+  const __u32 kCapsRequired = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
   IOCTL_OR_ERROR_RETURN_FALSE(VIDIOC_QUERYCAP, &caps);
   if ((caps.capabilities & kCapsRequired) != kCapsRequired) {
     LOG(ERROR) << "Initialize(): ioctl() failed: VIDIOC_QUERYCAP: "