RTC_[D]CHECK_op: Remove "u" suffix on integer constants

webrtc/modules/video_coding/codecs/vp9/vp9_frame_buffer_pool.cc

Index: webrtc/modules/video_coding/codecs/vp9/vp9_frame_buffer_pool.cc
diff --git a/webrtc/modules/video_coding/codecs/vp9/vp9_frame_buffer_pool.cc b/webrtc/modules/video_coding/codecs/vp9/vp9_frame_buffer_pool.cc
index b8a2dcd800702a57c048b0446e0e1503e46ee2b2..c5d2ed9e6146a53a0079dc4f63833ecc2d9d5a69 100644
--- a/webrtc/modules/video_coding/codecs/vp9/vp9_frame_buffer_pool.cc
+++ b/webrtc/modules/video_coding/codecs/vp9/vp9_frame_buffer_pool.cc
@@ -53,7 +53,7 @@ bool Vp9FrameBufferPool::InitializeVpxUsePool(
 
 rtc::scoped_refptr<Vp9FrameBufferPool::Vp9FrameBuffer>
 Vp9FrameBufferPool::GetFrameBuffer(size_t min_size) {
-  RTC_DCHECK_GT(min_size, 0u);
+  RTC_DCHECK_GT(min_size, 0);
   rtc::scoped_refptr<Vp9FrameBuffer> available_buffer = nullptr;
   {
     rtc::CritScope cs(&buffers_lock_);