Force events to be non blocking if main thread is unresponsive.

device/base/synchronization/shared_memory_seqlock_buffer.h

Index: device/base/synchronization/shared_memory_seqlock_buffer.h
diff --git a/device/base/synchronization/shared_memory_seqlock_buffer.h b/device/base/synchronization/shared_memory_seqlock_buffer.h
index 4835b097bc18d00832b581c192fc64b17e08b075..248dd9c16090e911461441e3ea204cc14ef6d0cf 100644
--- a/device/base/synchronization/shared_memory_seqlock_buffer.h
+++ b/device/base/synchronization/shared_memory_seqlock_buffer.h
@@ -21,6 +21,7 @@ namespace device {
 template <class Data>
 class SharedMemorySeqLockBuffer {
  public:
+  SharedMemorySeqLockBuffer() {}
   OneWriterSeqLock seqlock;
   Data data;
 };