Fix V4L2 style checks

Bug: internal b/169779668
Test: CQ
Change-Id: If435dd5870d08d1fd2031588d3a0fae1c46e46f6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2469366Reviewed-by: Alexandre Courbot <acourbot@chromium.org>
Commit-Queue: Sean Topping <seantopping@chromium.org>
Cr-Commit-Position: refs/heads/master@{#817150}

media/gpu/v4l2/buffer_affinity_tracker.cc

@@ -13,6 +13,8 @@ BufferAffinityTracker::BufferAffinityTracker(size_t nb_buffers) {
   resize(0);
 }
 
+BufferAffinityTracker::~BufferAffinityTracker() = default;
+
 void BufferAffinityTracker::resize(size_t nb_buffers) {
   base::AutoLock lock(lock_);
 
@@ -47,4 +49,4 @@ base::Optional<size_t> BufferAffinityTracker::get_buffer_for_id(
   return v4l2_id;
 }
 
-}  // namespace media
+}  // namespace media
\ No newline at end of file

media/gpu/v4l2/buffer_affinity_tracker.h

@@ -27,6 +27,7 @@ namespace media {
 class BufferAffinityTracker {
  public:
   explicit BufferAffinityTracker(size_t nb_buffers);
+  ~BufferAffinityTracker();
   size_t nb_buffers() const { return nb_buffers_; }
   // Resize this tracker and reset its state.
   void resize(size_t nb_buffers);

media/gpu/v4l2/v4l2_device.cc

@@ -1204,7 +1204,7 @@ base::Optional<V4L2WritableBufferRef> V4L2Queue::GetFreeBufferForFrame(
   }
 
   gfx::GenericSharedMemoryId id;
-  if (auto gmb = frame.GetGpuMemoryBuffer()) {
+  if (auto* gmb = frame.GetGpuMemoryBuffer()) {
     id = gmb->GetId();
   } else if (frame.HasDmaBufs()) {
     id = gfx::GenericSharedMemoryId(frame.DmabufFds()[0].get());